Celestial holiday ornament – I mean, supernova bubble

December 28, 2010

Supernova SNR 0509-67.5, image a composite of Hubble Space Telescope and CHANDRA X-ray Observatory images - image from NASA (click on image for larger view)

Supernova SNR 0509-67.5, image a composite of Hubble Space Telescope and CHANDRA X-ray Observatory images - image from NASA (click on image for larger view)

Press release from NASA:

This colorful creation was made by combining data from two of NASA’s Great Observatories. Optical data of SNR 0509-67.5 and its accompanying star field, taken with the Hubble Space Telescope, are composited with X-ray energies from the Chandra X-ray Observatory. The result shows soft green and blue hues of heated material from the X-ray data surrounded by the glowing pink optical shell which shows the ambient gas being shocked by the expanding blast wave from the supernova. Ripples in the shell’s appearance coincide with brighter areas of the X-ray data.

The Type 1a supernova that resulted in the creation of SNR 0509-67.5 occurred nearly 400 years ago for Earth viewers. The supernova remnant, and its progenitor star reside in the Large Magellanic Cloud (LMC), a small galaxy about 160,000 light-years from Earth. The bubble-shaped shroud of gas is 23 light-years across and is expanding at more than 11 million miles per hour (5,000 kilometers per second).

Data from Hubble’s Advanced Camera for Surveys, taken in 2006 with a filter that isolates light from glowing hydrogen were combined with visible-light images of the surrounding star field that were imaged with Hubble’s Wide Field Camera 3 in 2010. These data were then merged with X-ray data from the Chandra X-ray Observatory taken with the Advanced CCD Imaging Spectrometer (ACIS) in 2000 and 2007.

Credits: X-ray: NASA/CXC/SAO/J.Hughes et al, Optical: NASA/ESA/Hubble Heritage Team (STScI/AURA)


Atheists got no song, no hymnal but the blues?

December 28, 2010

Tip of the old scrub brush to Disciple/Methodist David Bates, with whom I used to enjoy singing bass on the back row of the choir.

From a 2010 production of Austin City Limits, Steve Martin joins the Steep Canyon Rangers in an a capella singing of the entire atheist hymnal.

Atheists have a very witty lyricist.

Update:  “Austin City Limits” asserted its copyright on that version (might be available at their website).  Here’s the song from a handheld camera at Merlefest, courtesy of Freedom Tuners:

Also via Boing-Boing; credit where credit is due.


Antique, if not ancient, technology

December 28, 2010

Slide rule, gifted to Art Hunt in December 2010 by his children - photo by Art Hunt

You could slide through the physics final with this device, at one time.

This is the device used to put humans on the Moon.

Have you ever used one?

It’s a slide ruleNice story about Art Hunt’s kids listening to tales from the olden days, and bringing back a little piece of the olden days for him.  He now claims to be ready for a power outage at his lab.

How does anyone understand a logarithmic scale anymore without a slide rule?  Does anyone make good slide rules anymore?

 


December 27, Good Trip Day: Darwin and Apollo 8

December 28, 2010

December 27 is one of those days — many of us are off work, but it’s after Boxing Day, and it’s not yet on to New Year’s Eve or Day.  We should have celebrated, maybe.

We should celebrate it as a day of portent:  A good embarkation, and a good, safe end to a nation-encouraging trip to almost touch the Moon.

HMS Beagle, Darwin's ship

HMS Beagle, on a voyage of discovery

On December 27, 1831, Charles Darwin and H.M.S. Beagle set sail on an around-the-world voyage of discovery that would change all of science, and especially biology, forever.

December 27 1831
After a few delays, H.M.S. Beagle headed out from Plymouth with a crew of 73 under clear skies and a good wind. Darwin became sea-sick almost immediately.

Darwin never fully overcame his seasickness, but he fought it well enough to become the single greatest collector of specimens in history for the British Museum and British science, a distinction that won him election to science societies even before his return from the trip — and cemented his life in science, instead of in the church.  Darwin’s discoveries would have revolutionized biology in any case.  In analyzing what he had found, a few years later and with the aid of experts at the British Museum, Darwin realized he had disproved much of William Paley’s hypotheses about life and its diversity, and that another, more basic explanation was possible.  This led to his discovery of evolution by natural and sexual selection.

Mini-sheet from the Royal Mail honoring Darwin's discoveries in the Galapagos Islands

Mini-sheet from the Royal Mail in 2009 honoring Darwin's discoveries in the Galapagos Islands

On December 27, 1968, Apollo 8 splashed down after a successful and heartening trip to orbit the Moon.  The three crewmen, Commander Frank Borman, James A. Lovell, Jr., and William A. Anders, had orbited the Moon, a very important milestone in the methodological race to put humans on the Moon (which would be accomplished seven months later).  1968 was a terrible year for the U.S., with the North Korean capture of the U.S.S. Pueblo, assassinations of Rev. Martin Luther King, Jr., and Sen. Robert F. Kennedy during the presidential campaign, riots in dozens of American cities, nasty political conventions with riots at the Democratic Convention in Chicago, a contentious and bitter election making sore the nation’s divide over Vietnam policy, and other problems.  On Christmas Eve, Borman, Lovell and Anders broadcast from orbit around the Moon, a triumphant and touching moment for the Apollo Program and Americans around the world.   Their safe return on December 27 raised hopes for a better year in 1969.

Motherboard.tv has a great write up from Alex Pasternack:

In 1968, NASA engineers were scrambling to meet President Kennedy’s challenge to land a man on the moon by decade’s end. Because delays with the lunar module were threatening to slow the Apollo program, NASA chose to change mission plans and send the crew of Apollo 8 all the way to the moon without a lunar module.

Exactly 42 years ago, the three astronauts of Apollo 8 became the first humans to orbit another celestial object. As they came around the dark side for the third time, Frank Borman, the commander, finally turned their capsule around. And then they saw the Earth.

Borman: Oh my God! Look at that picture over there! Here’s the Earth coming up. Wow, is that pretty.
Anders: Hey, don’t take that, it’s not scheduled.
Borman: (laughing) You got a color film, Jim?
Anders: Hand me that roll of color quick, will you…

One of the resulting photos taken by Anders on a Hasselblad camera became one of the world’s most iconic images.

As Bill Anders recalls it:

I just happened to have one with color film in it and a long lens. All I did was to keep snapping… It’s not a very good photo as photos go, but it’s a special one. It was the first statement of our planet Earth and it was particularly impressive because it’s contrasted against this startling horizon… After all the training and studying we’d done as pilots and engineers to get to the moon safely and get back, [and] as human beings to explore moon orbit, what we really discovered was the planet Earth.

Yeah, we missed toasting it on time in 2010.  Plan to raise a glass on December 27, 2011, to Good Trip Day for the human race.  December 27 is a day we should remember, for these achievements.


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