Showing posts with label And Another Thing. Show all posts
Showing posts with label And Another Thing. Show all posts

Friday, December 31, 2021

045 The Erickson Report for December 29 to January 12, Page 7: And Another Thing

045 The Erickson Report for December 29 to January 12, Page 7: And Another Thing

We close on a happier note, which is that we have an occasion of And Another Thing, where we step aside from politics to look at some cool science stuff.

And we have two, both from astronomy.

First, on Christmas Day, the James Webb Space Telescope was launched into space.

It is the largest, most powerful telescope ever sent up and once in place and deployed, will be able to do everything from giving close-ups of neighboring planets to seeing the first galaxies formed to aiding the search for extra-terrestrial life.

Twenty years in the design and development, the telescope, which "sees" in infrared, should be producing its first images in about six months.

Second, a couple of weeks ago, NASA announced that it has been confirmed that in April the Parker Solar Probe, which has been orbiting the Sun, passed through the corona, the upper atmosphere of the Sun - in effect, you could say the probe touched the Sun, surviving a three year journey and a roughly 2 million degree Fahrenheit environment to do what was previously thought impossible, a journey which already had provided more information about our source of heat and life while revealing new mysteries still to be explained.

Science is cool.

Thursday, December 30, 2021

045 The Erickson Report for December 29 to January 12

 



045 The Erickson Report for December 29 to January 12

- Good News on the minimum wage
- Thoughts prompted by the Kim Potter verdict 
- Clowns of the Year: Louis Gohmert and Dave Chappelle
- Outrage of the Year: vaccine selfishness 
- Special Clown/Outrage Award: "President" Joe Manchin 
- RIP: Desmond Tutu 
- And Another Thing: James Webb Space Telescope takes off; Parker Solar Probe "touches the Sun"

Friday, April 30, 2021

036 The Erickson Report for April 22 to May 5, Page Four: And Another Thing

036 The Erickson Report for April 22 to May 5, Page Four: And Another Thing

We're going to take a break now for something I keep meaning to make more common but never seem too. We call it And Another Thing, where we step aside from politics and social commentary to look at some science thing that I think is cool.

This time we start with the first picture to the right. It's a recently enhanced photo made from an original plate taken in May 1919 in Sobral, Brazil. It is, as I expect you guessed, of a solar eclipse.

It has some added color so that nice solar prominence can be easily seen. The original, of course was in black and white. But that's not the interesting part.

The second photo zooms into the lower right corner of the picture. Notice the two bright spots circled in red.

What's so special about these spots? Well, as I'm sure you knew, they are stars. What's important is that they shouldn't be there. Or more exactly, they shouldn't be where they are.

Which brings us to Albert Einstein and his Theory of Relativity. Relativity has the reputation of being extremely difficult to understand and indeed the mathematics involved in having a deep understanding of the theory are quite advanced and well beyond certainly my comprehension. But the concepts of the theory can be understood by any reasonably intelligent person. You may have to focus a bit, but you can understand it.

The basic concept to understand is that Einstein realized that we do not exist in a universe of three dimensions of space and a separate one of time, but a universe of four-dimensional spacetime. That space and time are interwoven, that each affects the other, and neither is absolute but can be distorted or warped - specifically, warped by the presence of mass.

His original Theory of Relativity, which later became the Special Theory of Relativity, described the effects of that insight in what are called non-accelerated frames of reference. That is, with objects moving in a straight line at a constant speed; more technically, objects moving at a constant velocity, so their acceleration is zero. Thus, a non-accelerated frame of reference

It became the Special Theory of Relativity because Einstein later expanded it to include accelerated frames of reference, where objects are changing their speed or direction of motion or both. That was the General Theory of Relativity - which served as Einstein's theory of gravity.

Newton described gravity as an attractive force between two objects, with the strength dependent on their masses and how far apart they are. Einstein, however, described gravity as the result of the warping of spacetime by mass. So anything traveling close enough to a massive enough object would have its path bent by the warping of spacetime. That means anything - even light.

Okay. The eclipse of 1919 was an excellent opportunity to test Einstein's idea. During an eclipse, astronomers can observe stars appearing close to the Sun, which otherwise would be lost in the glare. By comparing their positions with observations of those same stars at times when they are visible in the night sky, the amount by which their light has been deflected by the Sun can be measured.

Two expeditions went out, one to Sobral and one to the island of Principe off the west coast of Africa. There are great dramatic stories of the scientific struggles and frustrations involved, including the Principe expedition waking up to thunderstorms and getting only occasional glimpses of the Sun in breaks in the clouds and multiple plates in Sobral being ruined because it was hot enough to warp the lenses in the camera. But they managed to get enough plates to get results.

Now, Newton also predicted that light would have its path be deflected by gravity - but Einstein predicted more than twice the effect. Newton's theory predicted a deflection of 0.8 arc-seconds. Einstein predicted 1.8. An arc-second is 1/60 of an arc-minute, which is 1/60 of a degree, which is 1/360 of a complete circle. So yeah, an arc-second is small, but the size is unimportant, it's how closely prediction matches actual measurements.

The stars in this photo are deflected by just under 2 arc-seconds. The ones from Principe were measured at 1.6 arc-seconds. One a little above Einstein's predictions, one a little below, but both in line with it and far removed from Newton's.
These results, that is, were the first observational proofs of the General Theory of Relativity.

They made Einstein a figure known worldwide and other predictions of his theory, such as black holes, have been subjects of both scientific study and sci-fi ever since.

Which brings me to the third image. Almost exactly 100 years later, in April 2019, a worldwide collaboration of scientists produced this, the first ever image of, the first direct observational evidence of, a black hole.

With a mass roughly equal to 6.5 million of our Suns, this supermassive black hole is located in the galaxy M87, some 55 million light years away from Earth. By the way, M87 just means Messier 87, or number 87 in the Messier catalog of deep-sky objects.

Recall you can't see the black hole itself; the gravitational strength of a black hole is so great that anything passing the event horizon, even light, can't escape. Which is why it's called a black hole. As matter is drawn into the black hole, it swirls around, spiraling in, becoming extremely hot and becoming what scientists call luminous, giving off electromagnetic energy such as radio waves and X-rays. That's what you're seeing here.

The image was obtained using something called the Event Horizon Telescope, which linked together eight ground-based radio telescopes, effectively turning the Earth into one giant virtual radio telescope and creating a resolution sharp enough to focus on an orange on the surface of the Moon.

It also provided an extraordinary test of Einstein's theory of gravity and its underlying notions of space and time. One hundred years later and we are still getting observation evidence related to the General Theory of Relativity - and Einstein is still right.

As a footnote to this, what gave me a hook to raise this now, is that at he end of March of this year, 2021, the team that did the black hole picture followed it up with the final one here. Those visible swirls are in effect an image of the structure of the magnetic field in the event horizon of that black hole.

The image is enabling astrophysicists to analyze the nature and strength of that magnetic field and through that provide important insights into the still-mysterious nature of black holes. Because yes, they are still in a number of ways mysterious and even as more and more is learned there is a considerable amount still unknown about them.
 
And I think that is really cool.

Thursday, January 26, 2017

Two bits of science news I didn't have time for on the show

First, I now have a second reason beyond the next eclipse in 2024 to make sure I live another six to eight years.

A team of astronomers is predicting that in 2022, give or take a year, two stars in the constellation Cygnus will collide, creating an explosion in the night sky so bright that it will be visible to the naked eye.

It would mark the first time such an event was predicted by scientists.

I gather that it won't be some incredibly dramatic event, it won't be like a supernova visible even in the daytime, but it will be, again, visible to the naked eye in the night sky and it would just be so cool to be able to stand and look at the night sky and think that I was watching the explosion of a star some 1800 light-years away.

Our second bit of cool news is that in spring of 2017 nine telescopes around the world will aim towards the center of the Milky Way, around 25,000 light years away, in an attempt to capture the first-ever image of a black hole.

Black holes, by definition, do not emit visible light and we can't even "see" the blackness of the supermassive black hole at the center of the Milky Way because it is obscured by the clouds of gas that surround it.

But radio waves are not blocked by those clouds and by using a technique called interferometry that can synthesize data from multiple sources, these nine radio telescopes essentially can function as one big telescope as big as the entire Earth, with a resolution sufficient to show an orange on the Moon.

Which means these telescopes, working together, can create a radio image of the matter surrounding the black hole, enabling astronomers to "see" the black hole in its shadow.

Exactly what that will look like, no one knows. There are ideas, but no one actually knows. And that, as I think is always true in science, is part of the attraction.

Tuesday, January 24, 2017

10.7 - And Another Thing: total solar eclipse, August 2017

And Another Thing: total solar eclipse, August 2017

Let's try to at least end the week without any more gloom and doom. So we'll turn to And Another Thing, our occasional foray into something cool, usually cool science and at least not intentionally political.

This time we have a bit of truly cool astronomy stuff. It's something I just learned about a few weeks ago in reading a book about the Sun.

There is going to be a total eclipse of the Sun on August 21 visible in a wide swatch across the US. The path of totality will hit the coast just south of Portland, Oregon and pass over parts of 10 states before leaving shore just north of Charleston, South Carolina.

It will be the last total eclipse visible in the continental US and I believe anywhere in the US until 2024.

I am already making plans.

Saturday, January 21, 2017

What's Left #10




What's Left
for the week of January 19-25, 2017

This week:

Good News: sentence of Chelsea Manning commuted
http://www.reuters.com/article/us-usa-justice-manning-idUSKBN15130B
https://en.wikipedia.org/wiki/Chelsea_Manning

Footnote: on the legalities
http://lifehacker.com/how-presidential-commutations-and-pardons-work-1791306461

Clown Award: Reince Priebus
http://fair.org/home/wapo-organ-of-extreme-center-calls-mlk-true-conservative/
http://www.alternet.org/civil-liberties/riot-language-unheard-9-mlk-quotes-mainstream-media-wont-cite
http://www.dailykos.com/stories/2017/1/15/1620765/-Republicans-in-lather-over-question-of-Trump-s-legitimacy-want-wait-for-it-Obama-to-step-up
http://www.wbrc.com/story/34264012/the-latest-obama-wants-to-stop-future-election-interference?utm_campaign=SocialFlow&utm_source=Twitter&utm_medium=AP_Politics
http://swampland.time.com/2012/08/23/the-party-of-no-new-details-on-the-gop-plot-to-obstruct-obama/
http://www.politico.com/story/2015/07/donald-trump-birther-obama-119945

Outrage of the Week: Dems choose Big Pharma over consumers
http://www.commondreams.org/news/2017/01/12/big-pharma-backed-dems-join-gop-block-sanders-effort-end-drug-price-gouging
http://www.huffingtonpost.com/rj-eskow/-booker-and-the-other-big_b_14150632.html
http://www.drugguide.com/ddo/view/Davis-Drug-Guide/109517/all/Canadian_and_U_S__Pharmaceutical_Practices
http://act.demandprogress.org/sign/tell-congress-stop-21st-century-cures-act/
https://www.washingtonpost.com/news/powerpost/wp/2016/12/13/obama-paying-tribute-to-biden-and-bipartisanship-signs-21st-century-cures-act-tuesday/?utm_term=.57db35b48c3c
http://www.latimes.com/business/hiltzik/la-fi-hiltzik-21st-century-20161205-story.html
http://www.healthcareitnews.com/news/grab-bag-goodies-21st-century-cures-act

Protests continue and grow
https://pen.org/
http://www.pen-international.org/our-history/
http://www.nbcnews.com/news/asian-america/our-democracy-risk-writers-resist-martin-luther-king-jr-day-n707316
http://www.csmonitor.com/USA/Politics/2017/0116/Days-before-Trump-inauguration-writers-gather-to-celebrate-the-power-of-language
http://www.commondreams.org/news/2017/01/15/nationwide-rallies-are-ourfirststand-against-gop-assault-healthcare
http://www.huffingtonpost.com/entry/democrats-protest-defense-obamacare_us_587bd3e9e4b09281d0eb741d
http://www.chicagotribune.com/news/nationworld/politics/ct-bernie-sanders-michigan-healthcare-rally-20170115-story.html
https://www.bustle.com/p/these-our-first-stand-protest-photos-show-thousands-of-americans-fighting-for-their-lives-30602
https://www.bostonglobe.com/metro/2017/01/15/thousands-protest-health-care-repeal-faneuil-hall/CMBwr3f8vGpp7gTsyi7lCM/story.html
http://www.reuters.com/article/us-goldman-sachs-protest-idUSKBN15202G
http://money.cnn.com/2017/01/04/technology/loveathon-facebook-live/index.html
https://www.womensmarch.com/
https://www.washingtonpost.com/news/local/wp/2017/01/12/200-buses-have-applied-for-city-parking-on-inauguration-day-1200-have-applied-for-the-womens-march/?utm_term=.79a444756015
https://www.buzzfeed.com/juliareinstein/three-times-as-many-bus-permits-have-been-issued-for-the-wom?bftwnews&utm_term=.qyM92Z92N#.prEz0Mz0R
https://www.womensmarch.com/
http://gofossilfree.org/resist-reject-denial/?akid=19322.1038033.pVwONq&rd=1&t=1&utm_medium=email&utm_source=actionkit

Climate change: 2016 hottest year on record
https://www.yahoo.com/news/u-just-had-2nd-warmest-231445894.html
http://www.abc.net.au/news/2016-11-07/record-breaking-temperatures-will-be-new-normal-by-2030/8001720
http://wwlp.com/2017/01/09/u-s-had-near-record-heat-costly-weather-disasters-in-2016/
https://www.washingtonpost.com/news/energy-environment/wp/2016/11/17/the-north-pole-is-an-insane-36-degrees-warmer-than-normal-as-winter-descends/?utm_term=.affd41459fa9
http://www.nytimes.com/2016/11/22/science/global-warming-alters-arctic-food-chain.html
http://news.nationalgeographic.com/2016/11/tufted-puffins-die-off-bering-sea-alaska-starvation-warm-water-climate-change/
http://krqe.com/2016/11/29/great-barrier-reef-sees-record-coral-deaths-this-year/
http://www.livescience.com/57016-west-antarctic-ice-shelf-melting-inside.html
https://www.washingtonpost.com/opinions/global-opinions/not-even-trump-can-easily-reverse-our-progress-on-climate-change/2017/01/16/3d719356-dc25-11e6-ad42-f3375f271c9c_story.html
http://www.dailykos.com/story/2016/11/23/1603345/-Trump-to-scrap-all-NASA-climate-research
https://thinkprogress.org/trump-fools-the-new-york-times-on-climate-change-180323fa5980#.tinsiugbo
https://www.bloomberg.com/news/articles/2016-12-09/trump-team-s-memo-hints-at-broad-shake-up-of-u-s-energy-policy

And Another Thing: total solar eclipse, August 2017
https://en.wikipedia.org/wiki/Solar_eclipse_of_August_21,_2017

Sunday, December 25, 2016

7.2 - Why is New Year's Day on January 1?

Why is New Year's Day on January 1?

So now the natural follow-up: Why is January 1 New Year's Day? Because that wasn’t always true. So why?

In large part, the reason has to do with the convenience of the Roman senate, a calendar almost no one uses any more, and the stubbornness of tradition.

The earliest recorded New Year's celebrations are believed to have been in Mesopotamia about 4000 years ago, that is, about 2000 BCE. Babylonians began the year with the first new Moon after the vernal equinox and greeted it with a multi-day celebration called Akitu. This actually is a logical time to start the year, since the vernal equinox is the first day of spring, in mid-March, and spring is traditionally a time of beginnings, of renewals, of planting crops and the birth of new farm animals.

Some other ancient cultures used different days, but all had some astronomical or astrological significance:

The Egyptians used the heliacal rising of the star Sirius, the brightest star in the constellation Canis Major or the Big Dog. This took place in mid-July and it predicted the annual flooding of the Nile, an event so important to their agriculture.

Persians used the vernal equinox; the Phoenicians, the autumnal equinox, which is the first day of fall; while the Greeks used the winter solstice, the first day of winter.

All these choices carried some meaning beyond the date itself. January 1 doesn’t. So why January 1?

An early Roman calendar designated March 1 as the first day of a new year. This also explains something else you may have wondered about: If March is the first month of year, September is the seventh - and the Latin for "seven" is septem. Likewise, October, November, and December: octo being Latin for "eight," novem for "nine," and decem for "ten." Those months were named as they were because they were the seventh, eighth, ninth, and tenth months of the year.

That early Roman calendar was a lunar one, based on the Moon. The problem is, the average lunar month is about 29 and a-half days and there is no way that can match with a solar year of roughly 365 and a-quarter days. You're going to be off by something like 12 days a year. And it is the solar year, not the lunar year, which drives the seasons.

Janus
What’s more, that calendar consisted of 10 months and a 304-day year and didn't even count the days between the end of December and the beginning of the year at the vernal equinox, with the vernal equinox apparently being designated March 1.

The calendar was reformed around 713 BCE to add the months of January and February, creating a year of 355 days, still 10 days off the solar year. To correct this, the Romans from time to time inserted a leap month of about 22 days into February, which served to overcorrect the disparity between the calendars, giving them some time before the error again got so big that another leap month was required.

Next, according to general but apparently not universal agreement among historians, in about 153 BCE the Roman Senate moved first day of year to January 1 because that was beginning of the civil year, time that newly elected Roman consuls began their terms in office, and it was felt to be just more convenient to have the civil year and the legal year start on same day. January is also a reasonable time because January was named for Janus, the Roman god of gates, doors, and beginnings - that is, the god of all transitions - who had two faces so that he could see both the past and the future.

Julius Caesar
Despite all the attempts at correction, by the time of Julius Caesar, the calendar was again seriously out of whack with the solar year. So in 46 BCE Caesar introduced a new, solar-based calendar. This Julian calendar, as it came to be called, also introduced the use of leap years to keep the calendar year from drifting too far from the solar year and came with a decree that firmly fixed January 1 as the start of the new year.

After the Roman empire fell, the generally-accepted year for that being 476, and as Christianity began spread across Europe, the Catholic church, which remember had previously adopted and adapted a fair part of the merry side of Saturnalia, now felt it was in a position to downplay "pagan," "unchristian" festivals such as those that had come to surround the new year in Rome.

In 567, the second Council of Tours banned the use of January 1 as the first day of the new year. Remember, this is at a time in European history when the authority of the church in civil matters, not just religious ones, was all but unquestioned. If the church said do it, governments did it.

As a result, in the Middle Ages in Europe, the official new year started at different times in different places, including December 25, by then the traditional birthday of Jesus; the old day of March 1; March 25, the Feast of the Annunciation and right around the vernal equinox; and even Easter, even though was a different day year to year.

But remember: Julius Caesar had set January 1 as New Year’s Day in 46 BCE - which means that by time the Council acted, the practice of keeping that as the first day of the year had been going on for 613 years and was so well established that a lot of people simply ignored the "official" date and kept to the older one.

Pope Gregory XIII
The Julian calendar also was flawed because the solar year is actually a few minutes shorter than 365 days and six hours, so the use of leap years every four years slightly over-corrects the difference. A few minutes may not seem like a big difference, but again the error accumulates over time and by the latter 1500s it had grown to 10 days.

In 1582, Pope Gregory XIII oversaw design of new, more accurate calendar, which changed the rule of leap years such that only century years divisible by 400, not 4, would be leap years, the better to prevent the over-correction of the Julian calendar. Thus, 2000 was leap year, but 1900 wasn't and 2100 won't be.

This still leaves a tiny over-correction but it will take over 3000 years for that error to build up to a single day, so nobody really cares.

Most significantly for our story here, Pope Gregory apparently knew a losing battle when he saw one and surrendered to tradition, restoring January 1 as the official New Year's Day for the church.

Catholic countries in Europe were quick to adopt the new calendar, with Spain, France, and Italy doing so the year it came out. But Protestant ones did so only gradually, suspicious that the “Antichrist in Rome” was trying to trick them into worshiping on the wrong days.

A Happy and Peaceful Year to all
Scotland, for one, didn't adopt new calendar until 1600. And England, which had used March 25 as start of year since sometime in the 1100s, didn't finally make change from the Julian to the Gregorian calendar - along with its colonies, which included us - until 1752: 170 years later. By that time, the Julian calendar was 11 days behind the Gregorian, which was corrected by removing 11 days from the year: Wednesday, September 2, 1752 was followed by Thursday, September 14, 1752.

There are tales of riots breaking out with people believing their lives would be 11 days shorter or that they had lost 11 days of wages. While such sentiments existed, historians now are of opinion that the story of riots is a myth. However, the change of calendar was an issue in the 1754 parliamentary elections so it's hard to credit the idea that there were no protests of any sort.

Anyway, that's it: January 1 is the first day of year not due to any special meaning or relevance of date itself, but due to the convenience of the Roman Senate, the Julian calendar which almost no one uses anymore, and the surrender of Pope Gregory XIII to persistence of tradition.

So in the spirit of Constantine, let me say Merry Christmas, Happy Kwanzaa, Happy Chanukah, Happy Festivus, for all the atheists like me and all the pagans out there, Happy Winter Solstice, and to all of us, Happy Holidays and Happy New Year. Like the man in the story said, we are halfway out of the dark.

7.1 - Why is Christmas on December 25?

Why is Christmas on December 25?

This show, for most of you anyway, will be seen in the week between Christmas and New Year’s Day. So I’m going to give myself a holiday of sorts and take the week off from heavy-duty politics to devote the show to two segments of our occasional feature called And Another Thing. That’s where we step away from political stuff in favor of something else. Usually it’s some cool science stuff, but this time it’s some cool history stuff.

So for the rest of the show I’m going to be answering two questions: Why is Christmas on December 25? And why is New Year’s Day on January 1?

To answer about Christmas, right at the top, you have to realize something. Based on how we celebrate the season, based on how we - and by that I mean Americans and to a perhaps even greater extent Europeans - engage and embrace the season, the traditions we follow in our celebrations, Christmas is expressed in symbols such as Santa Claus, the Christmas tree, brightly-wrapped presents, candy canes, wreaths, and mistletoe, along with local traditions.

It is not expressed by a creche.

Because you know those people who go around saying that "Jesus is the reason for the season?" He isn't. And he never was. Now that half of you are composing nasty emails, let me explain. The season is because of astronomical patterns.

Until relatively recently, people were much more aware of the movements of the Sun and Moon and stars than we are now unless you are either a dedicated stargazer or an astronomer.

Such movements were necessary signs of the changing of the seasons, of when to plant, when to reap, when seasonal rains were coming, when game would be plentiful, and so on. The sky was their almanac, their seasonal calendar.

Some of that awareness lives on in popular expressions and mythology. For example, did you ever wonder why the hot humid days of July and August still sometimes are called "the dog days?" Ancient peoples by their observations were able to realize that the star we call Sirius, which is at its highest point in the sky in the middle of the night in the middle of winter, is at its highest point in the sky in the middle of the day in summer. Sirius is the brightest star in the constellation Canis Major, or the Big Dog, and is known as the Dog Star. So the middle of summer becomes the dog days.

In prehistoric times and even well into recorded history, people believed that things like the Sun acted willfully or were controlled by gods that acted willfully - and each year watching it get lower and lower in the sky each day as winter approached, a fear developed that one year, one of these great cycles, the Sun would keep sinking until it disappeared below the horizon, leaving them in perpetual darkness and cold. So each year, when the Sun stopped sinking and began to rise higher in the sky each day, it was reason to celebrate.

This is the time of the winter solstice, which occurs in the Northern Hemisphere, depending an exactly where you are, around December 21 or 22.

"Solstice" is derived from two Latin words - sol and sistere - which together mean that "the Sun stands still," which is what it appears to do at the solstice: to come to a stop and then reverse.

All over the Northern Hemisphere, this was a time to celebrate: Ancient Egypt had celebrations, as did ancient Greece - in fact, in the earliest days, theirs involved a human sacrifice.

The Druids celebrated, it was celebrated in Iran, Native American peoples of North America, including the Pueblo and the Hopi, had their celebrations.

In pagan Scandinavia the winter festival was called the Yule. Great yule logs were burned; people drank mead around bonfires listening to tales of great stories of the past. A boar was sacrificed to the chief god Odin, who donned a broad-brimmed hat and magic blue cloak and sped around the world at night on his great white horse. Mistletoe, which was a sacred plant because it grew on the most sacred tree, the oak, was cut and a spray given to each family to be hung in doorways as good luck.

That is our first reminder that a lot of our holiday traditions - including the term "Yuletide," the time of the Yule - are drawn from pagan ones, including decorating with garlands, wreaths, and the Christmas tree itself, along with the man who can magically fly around the whole world in one night.

For the date of Christmas, though, now we're getting into the space that lies between history and interpretation.

No one knows the date Jesus was born, no one even knows for sure what season of the year it was - or even what year it was. To the extent that the Bible can be trusted as a source we can be very confident that it was not in the winter since shepherds did not watch their flocks by night at that time of year; the flocks would most likely have been corralled.

In fact, "watching their flocks by night" was most commonly done in the spring to protect the newborn lambs from wolves, which had lead some to argue he must have been born in the spring. But that is an awfully thin reed on which to try to build a foundation, much less a conclusion.

What's more, the earliest known use in English of the word "Christes-Maess," or the Feast of Christ, or Christmas, was in a list of Feast Days with Mass Days that was set down in England in 1038, a thousand years after Jesus died. No Saint's day listed for December 25th.

In fact, not only did early church leaders (I'm talking 2nd and 3rd centuries here) argue about when Jesus was born - the options included January 2, March 21, March 25, April 18, April 19, May 20, May 28, November 17, November 20, and, yes, December 25 - some, such as Origen, argued that the whole thing was pointless and wrong because it shouldn't be celebrated at all. Celebrating birthdays, he said, was for pagan gods.

Still, by the mid-third century, the idea for having a day to celebrate the birth of Jesus was getting established. Nonetheless, it took some time for that notion to become formalized and for a date to be fixed.

Constantine
In 313, Constantine the Great issued the Edict of Milan, legally allowing Christianity in the Roman Empire - actually, he went considerably beyond that; the text actually says it was "proper that the Christians and all others should have liberty to follow that mode of religion which to each of them appeared best."

Which shows a lot more tolerance than many here do today, especially among our right-wing so-called Christians, the fanatics who get such a kick this time of year every year out of playing the oppressed victim under the relentless assault of the atheistic socialistic hordes - even though Christians make up over 78% of the US population.

Oh, and as a sidebar and contrary to popular belief, while Constantine considered himself “an emperor of the Christian people,” he did not actually formally convert by getting baptized until shortly before his death in 337 and Christianity did not become the official religion of Rome until 380, 43 years after his death.

Getting back to the point, the first recorded date of the birth of Jesus being celebrated on December 25th was not until 336, 300 years after Jesus died. And it wasn’t until 350 when Pope Julius I officially declared that the birth of Jesus would be celebrated on the 25th of December.

But that just brings us back to the start. How did the chosen date, why did the chosen date, come down to December 25? That was the question, after all.

To answer that, first remember that these developments were taking place in Rome, which had become the nerve center of organized Christianity.

The date brings us back to the winter solstice. The Romans, like many other ancient peoples, had solstice celebrations. In Rome it was called Saturnalia.

Saturnalia
This was originally a feast day to the god Saturn, but over time it grew to a gigantic fair and a festival of the home. It began with sacrifice of a pig and involved riotous merry-making, feasting, and gambling. Houses were decorated with laurel and evergreens. Schools were closed; the army rested; no criminals were executed. Friends visited one another, bringing good-luck gifts of fruit, cakes, candles, dolls, jewelry, incense, and more. Temples were decorated with evergreens. Processions of people danced through the streets, with masked or blackened faces and wearing fantastic hats.

Masters feasted with slaves, who could do and say what they liked - supposedly, anyway. I doubt they really felt free to push the privilege very far since a day or at most a few days later they would be back to just slaves, but hypothetically they could.

(Notice, by the way: traditions including decorating your home. Laurels. Visiting friends. Gift-giving. Holiday parties. Not Christian traditions, Roman ones. Pagan ones.)

The old Roman goddess of the solstice was Angerona, whose festival day was, logically enough for a goddess of the solstice, December 21st.

But when Mithraism, personified by the god Mithra, was introduced to Rome in the mid-2nd century, the goddess was largely supplanted in favor of Mithra's day of seasonal rebirth, which was December 25. Mithra, himself a composite of earlier beliefs, became amalgamated with a Roman sun god named Solis Indigeni, a god which in turn came from the Pelasgean titan of light named Helios.

This new being, this combination of Mithra and Solis Indigeni, this composite of two composites, was Sol Invictus, the invincible or unconquered Sun, and Mithra's day, December 25, became Dies Natalis Solis Invicti, or the birthday of the unconquerable Sun. When the emperor Aurelian proclaimed Mithraism the official religion of the Roman Empire in 274, the day became an official holiday.

Sol Invictus
So, put it all together. Before Constantine the Great issued his Edict of Milan, being a Christian in Rome could get you killed. Refusal to participate in the Imperial cult was considered treason.

During the Great Persecution carried out by the emperor Diocletian from 303 to 311, Christian buildings and the homes of Christians were torn down, their sacred books were collected and burned. Christians themselves were arrested, tortured, mutilated, burned, starved, and condemned to gladiatorial contests to amuse spectators.

So if you wanted celebrate the birth of the man you regarded as your savior - and the idea of having such a celebration was by then pretty widely accepted among Christians - you had to hide it. So since the time is purely symbolic and basically arbitrarily chosen because no one knows the actual date for certain and it's really based on tradition and nothing more, what better time to do it than during Saturnalia - when everyone else was celebrating and so no one would notice? And what better day to pick than December 25, when the birthday of the unconquerable Sun could be thought of as the birthday of the unconquerable “Son?"

Indeed, according to St. John Chrysostom, Bishop of Constantinople, writing in the late 4th or very early 5th century, just a few decades after Christianity had become the official religion of Rome, the "Roman Church purposefully placed the keeping of Christmas between two popular folk festivals, Saturnalia and the Kalends of January, in order to give Christians something to celebrate about [undisturbed] while others were engaged in secular merrymaking."

"Chrysostom," by the way, is I believe Greek for “golden-mouthed,” in praise of his eloquence.

By the year 354 CE, four years after Pope Julius I had designated it as such, December 25 had been accepted in Rome as the date of the Feast of Christ, or Christ-Mass, Christmas. Gradually most of the Christian Church agreed.

Once Christianity became the legal religion of Rome in 380, the church began appropriating what old pagan customs it could, with the result that the merry side of Saturnalia was gradually adopted and adapted to the observance of Christmas.

And so that is why Christmas in on December 25: Because Christians hid within, then adopted, then adapted, pagan celebrations of the winter solstice. By 1100 Christmas was the peak celebration of the year for all of Europe.

But let me finish up by saying that even then the idea was not universally accepted. Origen's conviction that celebrating the birth of a god was for pagans persisted among conservative Christians for centuries, including among the separatists and Puritans who settled Plymouth and Boston here in Massachusetts. They regarded Christmas as a pagan celebration with no Biblical justification. In fact, there were laws against it.

As an illustration of the attitude, we have the journal of Plymouth Colony governor William Bradford, who in the entry for 1621 recalled what he called a passage "rather of mirth then of weight." (Spelling in the excerpt has been modernized.)
On the day called Christmas day, the Governor called them out to work, (as was used,) but the most of this new company [Here is referring to some people who had arrived the month before, in November 1621, on a ship called “Fortune.”] excused themselves and said it went against their consciences to work on that day. So the Governor told them that if they made it a matter of conscience, he would spare them till they were better informed. So he led away the rest and left them; but when they came home at noon from their work, he found them in the street at play, openly; some pitching the bar and some at stool-ball, and such like sports. So he went to them, and took away their implements, and told them that was against his conscience, that they should play and others work. If they made the keeping of it a matter of devotion, let them keep to their houses, but there should be no gaming or reveling in the streets. Since which time nothing has been attempted that way, at least openly.
Recall that Bradford is writing here in about 1631 or 1632, about 10 years after the fact.

And not just here at home. In 1647, Great Britain's Puritan-dominated parliament abolished the feasts of Christmas, Easter, and Whitsun, known in the US as Pentecost.

Back in the US, in 1659, the MassBay colony - that is, Boston - banned celebrating Christmas
altogether. The ban remained in place for 22 years, until 1681, and even then it was a governor appointed by the restored British monarchy who revoked the ban.

Despite the lifting of the ban, the first recorded celebration of Christmas in Boston wasn't for another five years, in 1686. For many years thereafter, Thanksgiving remained the important seasonal holiday in New England.

In the wake of the revolution, interest in Christmas in the former colonies faded because it was seen as a British holiday. In fact, Christmas did not become a major holiday in the US until a religious revival in the early 1800s spurred interest in the day, particularly in the South. As a result, it was Louisiana, in 1837, which became the first state to make the day a holiday.

Even then, New England continued to lag behind: In Plymouth, the first time Christmas was mentioned in one the town’s newspapers as far as anyone can tell wasn't until 1825. As late as 1856, Henry Wadsworth Longfellow wrote that “The old Puritan feeling prevents [Christmas] from being a cheerful hearty holiday” in the region, but, he added, "We are in a transition state."

And so it was: By 1860 that same Plymouth paper was filled with ads for Christmas presents and by the end of the century Christmas was as much a part of Plymouth as it had become in the rest of the country.

What's Left #7




What's Left
for the week of December 22-28, 2016

This week:

And Another Thing: Why is Christmas on December 25?
https://en.wikipedia.org/wiki/Dog_days
http://www.religioustolerance.org/winter_solstice0.htm
http://www.religioustolerance.org/winter_solstice1.htm
https://www.biblegateway.com/passage/?search=Luke+2:8-14&version=KJV
http://web.archive.org/web/20110430004539/http://www.bsu.edu/web/01bkswartz/xmaspub.html
http://www.christianitytoday.com/ch/news/2000/dec08.html
http://christianity.about.com/od/christmas/f/christmashistor.htm
http://people.ucalgary.ca/~vandersp/Courses/texts/lactant/lactpers.html#XLVIII
http://religions.pewforum.org/reports
http://www.whychristmas.com/customs/25th.shtml
http://en.wikipedia.org/wiki/Constantine_the_Great_and_Christianity
http://mith.umd.edu//eada/html/display.php?docs=bradford_history.xml
http://www.historytoday.com/chris-durston/puritan-war-christmas
https://en.wikipedia.org/wiki/Whitsun
http://masstraveljournal.com/places/boston-cambridge/when-christmas-was-banned-boston
http://historyofmassachusetts.org/when-christmas-was-banned-in-boston/
"The Christmas Connection," lecture at Plymouth Antiquarian Society, Plymouth, MA, November 15, 1979

And Another Thing: Why is New Year's Day on January 1?
http://www.infoplease.com/spot/newyearhistory.html
http://www.history.com/news/history-lists/5-ancient-new-years-celebrations
https://en.wikipedia.org/wiki/Roman_calendar
http://mentalfloss.com/article/29611/why-does-new-year-start-january-1
http://www.infoplease.com/calendar/roman.html
http://www.holidays.net/newyear/story2.htm
http://en.wikipedia.org/wiki/January_1
http://www.historic-uk.com/HistoryUK/HistoryofBritain/Give-us- our-eleven-days/
https://en.wikipedia.org/wiki/A_Christmas_Carol_(Doctor_Who)

Sunday, September 11, 2016

259.5 - And Another Thing: dogs understand language

And Another Thing: dogs understand language

Finally for this week, a very quick instance of one of our occasional features called And Another Thing, where we step away from political stuff and step into some cool science stuff.

This time, it's the news that according to a new study, yes, your dog really does understand you. Not only can dogs understand the intonation used to say words, they can also understand the meaning of the words themselves. Not only that, but brain scans done in the study reveal that dogs process language using the same regions of the brain as people do.

Now, I have to say this comes as no surprise to me and, I suspect, a good number of dog owners.

In my case, I did my own little experiment. I had a dog named Penny. She was the smartest dog I have ever personally dealt with. I'm not claiming she was the smartest dog ever or the smartest in the world or whatever, but I do say she was the smartest with which I had personal experience - including both the dogs of friends and neighbors and the 10 dogs which I have owned over the years.

Penny always seemed to be able to learn the meaning of words and, importantly, to do it without any special training or sometimes, even without any intention on our part for her to do so.

For one prime example, she loved being outside. I used to call her a mudder because she didn't seem to care what the weather was or how nasty it was. She loved it so much that it got to the point where we couldn't even use the word "outside" in the middle of a sentence without hearing her bark, followed by the sound of a slide and a bang as she slid down the back hall and into the door leading to the yard, waiting to be let out.

So I decided to do a direct test. The word we used for dog treats was "goodie." We would offer the dogs - we had three at the time - treats by saying something like "Do you want a goodie?" but it would be in that sort of higher-than-normal-pitch tone of excitement that people often adopt for such occasions.

So I called Penny and said in that sort of voice "Do you want, do you want" - Penny is getting excited now, starting to come up on her back legs - "a schmidlap?" The excitement deflates. Penny looks confused. (I can't say that I actually said "schmidlap" as opposed to some other irrelevant word, even though it always has been one of my favorite nonsense words.)

"Do you want, do you want" - more excitement - "a reebzap?" Deflation. Confusion. (Ditto comment about "schmidlap.")

"What about," said in as flat a tone as I could manage and lacking the upturn at the end that indicates a question, "a goodie."

Bark bark bark bark!

Yeah, she knew the word.

And oh yeah, by the way, eventually, it got to the point where my wife and I could not even spell the word "outside" to ask each other if the dogs had been out recently without initiating a Pennygasm.

So I knew that dogs can know words, not just tone of voice, a long time ago. Still, it's always nice to have confirmation and the fact that dogs use the same parts of their brain to process language that we do is new information and pretty cool.

Sources cited in links:
https://www.washingtonpost.com/news/animalia/wp/2016/08/30/confirmed-your-dog-really-does-get-you/?wpisrc=nl_p1most-partner-1&wpmm=1

Left Side of the Aisle #259




Left Side of the Aisle
for the week of September 8-15, 2016

This week:

Good News: Massachusetts moves against unsafe guns
https://www.bostonglobe.com/metro/2016/07/20/mass-attorney-general-says-she-crack-down-assault-weapons/8xmuDyW6DR1tkt7mBNncRK/story.html
http://www.bloomberg.com/news/articles/2016-09-06/a-new-legal-assault-on-firearm-makers-some-guns-may-be-dangerous?cmpid=google&google_editors_picks=true
http://www.bostonglobe.com/metro/2016/08/31/healey-launches-gun-safety-investigation/EqmsKiAIeweTWxbuk0NKNO/story.html

Clown Award: Ninth Circuit Court of Appeals
https://www.youtube.com/watch?v=3Fn36l_z3WY
http://reason.com/blog/2016/09/01/9th-circuit-says-medical-marijuana-cardh
http://www.alternet.org/drugs/increased-access-cannabis-associated-reductions-violent-crimes
http://www.msnbc.com/all/does-marijuana-lower-the-crime-rate
http://www.huffingtonpost.com/2014/08/25/marijuana-study_n_5711217.html
https://www.weedsta.com/articles/study-finds-marijuana-does-not-lead-to-violent-behavior

Update: phasing private prisons out of the federal system
http://whoviating.blogspot.com/2016/08/2582-good-news-federal-private-prisons.html
http://whoviating.blogspot.com/2016/08/2583-not-good-news-phaseout-does-not.html
http://www.latimes.com/nation/la-na-immigration-detention-20160906-snap-story.html?track=lat-pick
https://en.wikipedia.org/wiki/Kelo_v._City_of_New_London
http://whoviating.blogspot.com/2004/10/in-case-you-missed-it.html
http://whoviating.blogspot.com/2005/06/so-do-tell-whats-been-going-on-while-i_27.html
http://www.desmogblog.com/2016/08/31/profit-pipeline-company-claims-public-benefit-seizing-private-lands-pennsylvania
https://theintercept.com/2016/06/27/private-prison-trump-clinton/
http://www.sfexaminer.com/wheres-pen-gov-brown/
https://en.wikipedia.org/wiki/Private_prison#In_the_United_States

More media failure
http://www.ktnv.com/news/las-vegas-man-facing-charges-after-posting-threatening-youtube-video
http://www.nydailynews.com/news/national/conspiracy-theorist-charged-threatening-terror-attack-article-1.2767259
https://www.youtube.com/user/FisherOfPeople
http://www.care2.com/causes/clinton-explains-exactly-how-trump-is-peddling-hate-in-alt-right-speech.html
https://en.wikipedia.org/wiki/File_Transfer_Protocol
https://en.wikipedia.org/wiki/Gopher_(protocol)
https://en.wikipedia.org/wiki/Usenet_newsgroup

And Another Thing: dogs understand language
https://www.washingtonpost.com/news/animalia/wp/2016/08/30/confirmed-your-dog-really-does-get-you/

Sunday, April 10, 2016

243.9 - And Another Thing: Possible Viking site found in Newfoundland

And Another Thing: Possible Viking site found in Newfoundland

Last for this week, let's end on something lighter, with an episode of our occasional feature called And Another Thing, where we turn away from political things to talk about some cool science stuff. This time, it's some cool archaeology stuff.

The Norse sagas and Viking legends are often ripping good yarns of exploration and discovery with a good number of epic battles thrown in - kind of like Peter Jackson for history geeks.

But they have also provided historical material, including enabling the discovery in 1960 of a Viking settlement at L'Anse aux Meadows at the northern tip of Newfoundland. It was the only known Viking site in North America.

Until, quite possibly, now.

Archaeologists using satellite images have discovered what they believe to be a Viking site at Point Rosse at the southeast tip of Newfoundland, some 600km - about 370 miles - south of L'Anse aux Meadows.

Excavations at the site have uncovered evidence of a Norse-like hearth and eight kilograms of early bog iron. The Norse were the only ones extracting iron from bogs 1,000 years ago.

They haven't found a lot of artifacts, which actually strengthens the idea that Vikings were present at the area at some point, because they tended to have fleeting settlements, so there would not have been a lot of time for things to be discarded or broken and so be left at the site for later discovery. That is, the lack of artifacts doesn't prove the idea that the site was a Viking settlement as opposed to some other sort, but it does even less to contradict it.

It needs to be emphasized that this is a possible Viking site; much more study needs to be done if that is to be confirmed. It took several years to get widespread agreement that L'Anse aux Meadows was a Norse site.

But lead researcher Sarah Parcak says that her team has not found any contradictory evidence, suggesting, she said, that means that either this is a Norse site - or a new culture that presents as Norse.

If it is confirmed, it would widen our understanding and knowledge of the Viking experience in North America. Which personally I find rather exciting - because, after all, Vikings! Looting and pillaging their way across hundreds of years of European history: That's my heritage!

Sources cited in links:
http://www.independent.co.uk/news/world/world-history/discovery-vikings-newfoundland-canada-history-norse-point-rosee-l-anse-aux-meadows-a6965126.html
http://www.cbc.ca/news/canada/newfoundland-labrador/vikings-newfoundland-1.3515747
http://www.techtimes.com/articles/146754/20160403/newly-discovered-viking-site-in-canada-may-rewrite-history.htm

Saturday, April 09, 2016

Left Side of the Aisle #243




Left Side of the Aisle
for the week of April 7-13, 2016

This week:

Good News: Supreme Court upholds class action suit claims
http://www.aol.com/article/2016/04/04/us-supreme-court-declines-to-take-up-wal-mart-class-action-appea/21337884/

Good News: Supreme Court rejects attack on agency fees
https://www.washingtonpost.com/politics/courts_law/supreme-court-deadlocks-over-public-employee-union-case-calif-teachers-must-pay-dues/2016/03/29/b99faa30-f5b7-11e5-9804-537defcc3cf6_story.html
http://www.dailykos.com/story/2016/3/29/1507564/-A-Scalia-less-deadlocked-Supreme-Court-spares-unions-For-now

Good News: Supreme Court unanimously smacks down attempt to redefine "one-person-one-vote"
http://www.theatlantic.com/politics/archive/2016/04/supreme-court-evenwel/476769/
http://www.aol.com/article/2016/04/04/update-2-u-s-top-court-rejects-conservative-challenge-in-one-p/21337940/

RIP: Patty Duke
http://abcnews.go.com/Entertainment/patty-duke-dead-69/story?id=38004939
http://www.khq.com/story/31651923/patty-dukes-husband-calls-sepsis-a-silent-killer
https://www.yahoo.com/celebrity/news/sean-astin-mom-patty-dukes-210040048.html?ref=gs
http://www.cdapress.com/news/local_news/article_6fed8c92-fa1f-11e5-b579-8bf1ced9a8d3.html

Update: "Equitable sharing" back in force
http://whoviating.blogspot.com/2015/01/1901-good-news-mostly-feds-largely-end.html
https://www.washingtonpost.com/news/volokh-conspiracy/wp/2016/03/30/justice-department-reinstates-federal-program-that-helps-state-cops-act-like-robbers/
http://www.truth-out.org/news/item/35429-doj-resurrects-policing-for-profit-program
https://www.washingtonpost.com/news/wonk/wp/2015/11/23/cops-took-more-stuff-from-people-than-burglars-did-last-year/

Clown Award: Idaho Gov. Butch Otter
http://www.dailykos.com/story/2015/8/19/1413473/--Patriot-guarding-Muslim-free-gun-store-accidentally-shoots-himself
http://www.muskogeephoenix.com/news/checotah-man-accidentally-shoots-self-while-guarding-store/article_bdef6cb6-45f8-11e5-8676-d37a877e4cba.html
http://www.care2.com/causes/gop-bans-guns-at-republican-national-convention.html
http://wonkette.com/600291/maine-gov-paul-lepage-will-teach-democrats-lesson-by-refusing-to-swear-any-of-them-in
http://www.pressherald.com/2016/04/01/lepage-refuses-to-swear-in-senator-elect-over-spat-with-democrats/
http://www.dailykos.com/stories/2016/3/29/1507746/-Idaho-governor-on-not-expanding-Medicaid-People-with-insurance-still-die

Outrage of the Week Number 1: 1 million losing Food Stamps
http://www.wsws.org/en/articles/2016/04/04/food-a04.html
https://en.wikipedia.org/wiki/Able-bodied_Adults_Without_Dependents
http://www.chicagotribune.com/news/nationworld/ct-food-stamps-work-mandate-20160402-story.html
http://www.csmonitor.com/USA/USA-Update/2016/0402/As-US-economy-rebounds-1-million-people-could-lose-food-stamps-benefit

Outrage of the Week Number 2: Nearly 2/3 of Americans approve of torture
Sources cited in links:
http://www.reuters.com/article/us-usa-election-torture-exclusive-idUSKCN0WW0Y3
http://theweek.com/articles/441396/why-torture-doesnt-work-definitive-guide
https://www.theguardian.com/science/the-lay-scientist/2010/nov/04/2
https://www.cgu.edu/pdffiles/sbos/costanzo_effects_of_interrogation.pdf
http://www.nbcnews.com/storyline/cia-torture-report/senate-report-finds-cia-interrogation-tactics-were-ineffective-n264621
http://www.care2.com/causes/torture-doesnt-work-but-most-americans-support-it.html
http://www.care2.com/causes/torture-by-navy-seals-covered-up-in-afghanistan.html

And Another Thing: Possible Viking site found in Newfoundland
http://www.independent.co.uk/news/world/world-history/discovery-vikings-newfoundland-canada-history-norse-point-rosee-l-anse-aux-meadows-a6965126.html
http://www.cbc.ca/news/canada/newfoundland-labrador/vikings-newfoundland-1.3515747
http://www.techtimes.com/articles/146754/20160403/newly-discovered-viking-site-in-canada-may-rewrite-history.htm

Saturday, October 03, 2015

Left Side of the Aisle #221




SORRY - STILL RECOVERING FROM MY HARD DRIVE CRASH. TRYING TO CATCH UP.

Left Side of the Aisle
for the week of September 24-30, 2015

This week:

Good News: Alabama to mandate teaching of evolution and climate change

Good News: Hillary Clinton finally comes out against Keystone XL pipeline

Some good news on climate change

Some bad news on climate change

And Another Things: dogs and cats can see in ultraviolet

Monday, May 04, 2015

202.6 - And Another Thing: the Hubble Space Telescope at 25

The Hubble Space Telescope at 25

I don't know how I missed this last week but I did. This past Friday, April 24, was the 25th anniversary of the launch of the Hubble Space Telescope.

The Hubble Space Telescope was named for Edwin Hubble, the American astronomer who in the 1920s showed first that the Milky Way is not the only galaxy, expanding our sense of the scale of the universe by a factor of multiple billions, and then later in the decade proved that the universe is not static but is expanding. The Hubble was conceived from the beginning as a telescope in space, one designed to operate outside the atmosphere of Earth and so without the visually-distorting effects of looking through that atmosphere.

It has worked brilliantly at that. But it didn't start that way. About a month after the telescope was set in orbit during a space shuttle mission came what's called in the trade "first light," the first image to be seen through a new telescope. It came - and it was blurry.

The media reaction was harsh. It was a failure, a boondoggle, a waste, a washout, useless. None of that was really true: Even the blurry images were superior to what could be obtained by Earth-bound observatories. But they were not nearly what they should have been or what the Hubble was designed to produce. It was a huge disappointment.

The problem was quickly diagnosed as spherical aberration, where light striking close to the edges of the telescope's primary mirror is not focused at the same place as light striking the mirror closer to the center, resulting in a blurred, out-of-focus image. The primary mirror in the Hubble is 2.4 meters (just about 8 feet) across and it was, in the words of one, "perfectly flawed" - it was made to the exact specifications called for, but the specifications were a little off. And so, therefore, were the images the mirror produced.

Happily for the Hubble, some optics specialists figured out a way to add small mirrors to correct for the aberraion, a process some described as fitting the telescope with a pair of glasses. In 1993, three years after the launch, another space shuttle mission did repairs - and the results were fantastic.

When those first images began to hit the media, for maybe the first time, no one needed to have an excuse for being an astronomer. No one needed to answer the inevitable "So what's the point?" for their interest in the stars and the galaxies and what they are made of and how they form and what will happen to them.

In the words of Adam Frank, an astrophysics professor at the University of Rochester, Hubble
showed us the universe in ways we simply could not have imagined before. When it showed us light-year-spanning cathedrals of gas where new stars are born, Hubble revealed a new kind of grace. When it showed us glittering but ancient jewels marking the apocalyptic death of stars, it spoke of power on a scale words cannot embrace. Hubble gave humanity a new visual vocabulary for space.

But it was not just a matter of the glorious look of the images. It was what they revealed.

The Hubble Space Telescope triggered the discovery of the still-not-understood dark energy when it showed us that not only is the universe expanding, the rate at which it's expanding is increasing. The effect has been likened to throwing a ball into the air and having it rise faster and faster as it goes up.

The Hubble gave us our first visible-light picture of an exoplanet, a planet orbiting a star other than our Sun.

It has advanced the search for extraterrestrial life with its ability to reveal something about the atmospheres of exoplanets, where it has found cases of carbon dioxide, organic molecules, and even water vapor in some of those atmospheres.

It has advanced our understanding of black holes, those collapsed remnants of massive stars were local gravity is so great that even light can't escape and has provided evidence that a supermassive black hole lies at the heart of almost all galaxies (including our own Milky Way), advancing our knowledge of how galaxies form.

It enabled us to watch the impact of a comet or asteroid on Jupiter almost in real time.

It has enabled us to look deep into the history of the cosmos. Remember that the speed of light is not infinite; light takes time to get from one place to another. What you see is not how an object is at your own "now" but how that object was at time moment the light left it. Which means the further out into space you go, the further back in time you are looking. By looking into deep space, Hubble has enabled us to look into deep time to see galaxies and clusters as they were billions of years ago.

And by looking at those exoplanets, the Hubble Space Telescope has even helped better our understanding of how our own Earth formed.

Quoting Adam Frank again:
From planets to black holes to the large-scale structure of the universe entire, you'd be hard-pressed to find a domain of cosmic science whose textbooks haven't been rewritten because of the Hubble Space Telescope.
The fact is, how we see space and our place in the cosmos we now see through Hubble's eyes; it is a reflection of what the Hubble Space Telescope has seen and shown us.

The Hubble is nearing end of its life. The original plan was for periodic maintenance missions but with the end of the shuttle program in 2009, that possibility is gone. NASA expects that in another year or two the telescope's instruments will start to break down. At some point, it will be brought down from orbit, most of it to burn up in the atmosphere and the rest to splash down in the Pacific Ocean.

That won't be the end of the story, however, just the Hubble's chapter. The next space telescope, the James Webb Space Telescope, is to launch in 2018. It's an infrarad-detecting scope. Why is that important? Because of the expansion of space, the further away something is, the faster it is moving away from us. As it does so, the wavelength of the light it emits gets stretched, making the light redder and redder. It's called redshift and astronomers can use it to tell how far away an object is. (It's also how Edwin Hubble proved the universe is expanding.) It's a visual version of the Doppler effect, usually illustrated by noting how the sound a ambulance siren makes changes as it approaches you, goes by, and moves away.

The point of all this is that if an object is far enough away, the light it emits becomes so redshifted that it is no longer in the visual spectrum but is in the infrared. Yes, the Hubble could take images in the infrared, but the James Webb telescope is designed to maximize abilities in that range. Which means that by "seeing" in the infrared, the James Webb Space Telescope may well be able to see further out in space - and so further back in time - than even the Hubble could.

We'll have to wait to see what new wonders that can reveal.

Sources cited in links:
http://www.theguardian.com/science/2015/apr/23/the-hubble-space-telescope-its-a-terrific-comeback-story
http://www.biography.com/people/edwin-hubble-9345936#acclaimed-career
http://www.npr.org/2015/04/23/401781449/hubble-telescope-celebrates-25-years-in-space
http://news.discovery.com/space/astronomy/hubble-at-25-science-that-transformed-our-cosmos-150423.htm
http://www.livescience.com/46593-how-earth-formed-photo-timeline.html
http://www.jwst.nasa.gov/
http://www.physicsclassroom.com/Class/waves/u10l3d.cfm

Sunday, April 05, 2015

198.8 - And Another Thing: new research suggests way life began

And Another Thing: new research suggests way life began

One of the most common misunderstandings about evolution is found in the charge - intended as a withering attack - that it can't explain how life began.

That's true - it can't. It's also wholly irrelevant because that's not what evolution in about. Evolution is about how life changes in response to, and in turn affects, environment. The question of how life began is an entirely different field of study called abiogenesis (or biopoiesis).

The problem for abiogenesis is that the origin of life on Earth looks like a string of conundrums. There has to be something like DNA or RNA to make proteins but modern cells can’t copy DNA and RNA without the help of those very proteins. And none of these molecules can do their jobs without fatty lipids, which provide the membranes that cells need to hold their contents inside - but the protein-based enzymes encoded by the DNA or RNA are needed to synthesize lipids.

That is, everything needed for the thing it is responsible for creating to have already existed in order for that first thing to be there to make it. It's the old chicken-and-egg question.*

Now, a team of researchers at Cambridge University in the United Kingdom have found that just two simple compounds, hydrogen cyanide (HCN) and hydrogen sulfide (H2S), each of which would have been abundant on the early Earth, plus ultraviolet light, also abundant on the early Earth, can initiate a series of chemical reactions that produce all three major types of biomolecules - nucleic acids, amino acids, and lipids.

These are separate sets of reactions; it's not one reaction producing all three at once in the same place. The important point is that these reactions provide an independent means of producing these types of molecules, breaking out of the chicken-and-egg trap by providing a point of entry into the now-existing pattern.

This work, published in the peer-reviewed journal "Nature Chemistry," does not prove this is how life started but it does provide at the very least a plausible mechanism by which it could have happened, a mechanism that is in line with current best knowledge about the chemistry and conditions of the early Earth.

Which I think is pretty doggone cool.

*Which does have an answer, by the way.

Sources cited in links:
https://en.wikipedia.org/wiki/Abiogenesis
http://news.sciencemag.org/biology/2015/03/researchers-may-have-solved-origin-life-conundrum
http://www.nature.com/articles/nchem.2202.epdf?referrer_access_token=MXfcrirB3XhUlX43DbsvEdRgN0jAjWel9jnR3ZoTv0NIo3js7EMAlL7iCggjrUCBrW4ZYTThpc_6DIsDphT9-A1BfL9NwZH8DLA1qmS-mFJSmY_r7_REqDO0W-NgqQ41BcezUDi2H0ILyguqM67PmKg3u4Zyl0LsPNDFw0rZrhVz744QBMtFCv048nn_WhWK2S1q-v2r7llTu2ClJOfnVBYfsoeGfcZlFLS5DBbhZX8%3D&tracking_referrer=news.sciencemag.org

Left Side of the Aisle #198




Left Side of the Aisle
for the week of April 2-8, 2015

This week:
Not Good News: Indiana passes God Gave Me The Right To Be A Bigot law
http://www.huffingtonpost.com/2015/03/26/indiana-governor-mike-pence-anti-gay-bill_n_6947472.html
https://iga.in.gov/static-documents/9/2/b/a/92bab197/SB0101.05.ENRS.pdf
http://www.mediaite.com/tv/stephanopoulos-corners-pence-over-lgbt-discrimination-its-a-yes-or-no-question/
http://www.politifact.com/truth-o-meter/statements/2015/mar/29/mike-pence/did-barack-obama-vote-religious-freedom-restoratio/

Good News: reaction to that law "scorches" Indiana Gov. Mike Pence
http://talkingpointsmemo.com/livewire/indy-star-editorial-religious-freedom
http://www.rawstory.com/rs/2015/03/gop-indianapolis-mayor-defies-pence-bans-discrimination-by-christian-businesses-receiving-city-funds/
http://www.usatoday.com/story/money/business/2015/03/30/ind-religious-freedom-bill-business-reaction/70693326/
http://talkingpointsmemo.com/livewire/charles-barkley-ncaa-indiana-anti-gay-law
http://talkingpointsmemo.com/livewire/olbermann-ncaa-final-four-indiana
http://espn.go.com/college-sports/story/_/id/12587768/ncaa-president-mark-emmert-keeping-close-eye-indiana-legislators-new-law-allow-businesses-discriminate-gays-lesbians
http://www.dailykos.com/story/2015/03/30/1374389/-Connecticut-governor-vows-to-ban-state-funded-travel-to-Indiana
http://www.huffingtonpost.com/2015/03/30/washington-indiana-discrimination-law_n_6973700.html
http://talkingpointsmemo.com/livewire/mayors-governors-travel-bans-indiana
http://helenair.com/news/state-and-regional/montana-house-narrowly-defeats-religious-freedom-bill/article_378a8c72-427b-56b3-ab05-a75eafaead06.html

Not Good News: Arkansas and North Carolina considering even worse versions
http://talkingpointsmemo.com/news/arkansas-anti-gay-bill-indiana
http://talkingpointsmemo.com/livewire/walmart-veto-arkansas-religious-freedom
http://www.washingtonpost.com/news/morning-mix/wp/2015/03/31/arkansas-and-north-carolina-are-latest-states-to-consider-religious-freedom-bills/

Clown Award: Bill O'Reilly
http://crooksandliars.com/2014/05/bill-oreilly-demographic
http://www.washingtonindependentreviewofbooks.com/bookreview/killing-history-jesus-in-the-no-spin-zone
http://www.rawstory.com/rs/2015/03/bill-oreilly-negative-reviews-for-killing-jesus-shows-its-open-season-on-christians-in-america/
http://www.salon.com/2015/03/31/bill_oreilly_blames_bad_killing_jesus_reviews_on_prejudice_it_is_open_season_on_christians/
http://www.nydailynews.com/entertainment/tv/killing-jesus-review-national-geographic-movie-article-1.2162201
https://en.wikipedia.org/wiki/Jim_Bishop

Voter suppression is a right-wing scam
https://www.youtube.com/watch?v=8GBAsFwPglw
http://www.washingtonpost.com/blogs/wonkblog/wp/2014/08/06/a-comprehensive-investigation-of-voter-impersonation-finds-31-credible-incidents-out-of-one-billion-ballots-cast/
http://www.brennancenter.org/analysis/voter-id
http://www.washingtonpost.com/politics/courts_law/supreme-court-lets-wisconsin-voter-id-law-stand/2015/03/23/9d82b8da-d162-11e4-a62f-ee745911a4ff_story.html
http://www.prwatch.org/news/2015/03/12778/voter-id-will-take-effect-wisconsin-heres-what-means
http://www.huffingtonpost.com/2014/09/12/wisconsin-voter-id_n_5813360.html
http://www.cnn.com/2015/03/23/politics/scott-walker-wisconsin-voter-id-law-supreme-court/

Outrage of the week: media failure on voter suppression
http://www.washingtonpost.com/politics/courts_law/supreme-court-lets-wisconsin-voter-id-law-stand/2015/03/23/9d82b8da-d162-11e4-a62f-ee745911a4ff_story.html
http://fair.org/blog/2015/03/09/voting-rights-shall-not-overcome-nyt-reporting-like-this/

Unintentional Humor: US learns Israel is spying on negotiations with Iran by spying on Israel
http://www.usatoday.com/story/news/world/2015/03/24/spying-reveals-us-israel-tensions-over-iran/70378578/
http://www.wsj.com/articles/israel-denies-spying-on-u-s-1427204013

And Another Thing: new research suggests way life began
https://en.wikipedia.org/wiki/Abiogenesis
http://news.sciencemag.org/biology/2015/03/researchers-may-have-solved-origin-life-conundrum
http://www.nature.com/articles/nchem.2202.epdf?referrer_access_token=MXfcrirB3XhUlX43DbsvEdRgN0jAjWel9jnR3ZoTv0NIo3js7EMAlL7iCggjrUCBrW4ZYTThpc_6DIsDphT9-A1BfL9NwZH8DLA1qmS-mFJSmY_r7_REqDO0W-NgqQ41BcezUDi2H0ILyguqM67PmKg3u4Zyl0LsPNDFw0rZrhVz744QBMtFCv048nn_WhWK2S1q-v2r7llTu2ClJOfnVBYfsoeGfcZlFLS5DBbhZX8%3D&tracking_referrer=news.sciencemag.org

Note: There obviously have been some fast-moving events regarding the Indiana law which occurred after this show was done and so are not addressed here. They will be addressed next week in an Update.

Friday, March 13, 2015

195.9 - And Another Thing: researchers make quantum photograph of light as simultaneously wave and particles

And Another Thing: researchers make quantum photograph of light as simultaneously wave and particles

Last for this week, another reach into the pile labeled And Another Thing.

All right, here's the deal. The argument that had gone on in science for a few hundred years about whether light is a wave or stream of particles was solved by Einstein: It's both, simultaneously.

This also meant in practice that if you looked at light as if it were a wave, you detected it as a wave. If you looked at it like it was a stream of particles, called photons, you detected it as a stream of particles. What you got depended on how you looked at it. In a way, it's like trying to describe how you see a piece of paper: It will depend on whether you are looking at it broadside on or edge-on; both are accurate descriptions of the same paper, but will still be considerably different.

But here's the problem: If light is both particles and a wave, how can you see it as both at the same time? You would think you should be able to since it is both, but how can you do that if how you see it depends on how you look at it? How can you see the broadside view and the edge-on view of the paper at the same time?

A team of Swiss and American researchers at the EPFL labs in Switzerland say they have overcome the problem. Using an advanced electron microscope - one of only two of that type on the planet - the team has generated a kind of quantum photograph of light behaving as both a particle and a wave.

First, the team fired laser light at an extremely thin wire and created a standing wave. You know what that is: Think of having a rope secured at one end and you flip the free end, sending a wave down the rope which bounces back from the secured end. But if you keep flipping in the correct rhythm, you can set up a pattern where the waves in the rope don't move along it but just go up and down. That's a standing wave.

Okay, having done that, the researchers then fired a stream of electrons very close to the wire, so close that the electrons interacted with the photons, that is, the particles of light, causing a transfer of energy that would case the particles to either speed up or slow down. That change can be detected and measured.

Then all you have to do is "take a picture" - which in this case is a lot more complicated than whipping out your iPhone and involves a lot of mathematical reconstruction, but the idea of "getting an image" is pretty much the same.

The result is what you see in the illustration: the world's first photo showing light behaving as both a wave and a particle. The wave depiction is at the top, and the bottom slice shows the photons.

And if you don't think that's cool, there is no hope for you.

Sources cited in links:
http://news.discovery.com/tech/photo-first-lights-captured-as-both-particle-and-wave-150302.htm
 
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