North Korea: A hole in the fabric of the 21st century

February 25, 2014

Here’s a photograph of one of the greatest, and longest-running tragedies of our time.

No, that’s not a stretch of water in the red circle.  That’s North Korea, at night, blacked out by a lack of electrical lights.

Tweetpic from the Washington Post: North Korea looks like a sea of misery in this photo from space  via @KnowMoreWP

Tweetpic from the Washington Post: North Korea looks like a sea of misery in this photo from space via @KnowMoreWP

It’s a photo from the International Space Station taken in January.

The KnowMore blog from the Post describes the tragedy, and points to even more disturbing stories:

North Korea appears as nothing more than a shadow in the above photograph, taken at night aboard the International Space Station last month. South Korea’s eastern coastline is indistinguishable from the demilitarized zone along the border with the North, as though the Sea of Japan flowed into the Yellow Sea and Pyongyang were an island in a strait separating South Korea from China.

North Korea’s interior is nearly invisible from orbit at night, just as what happens inside the country on a day-to-day basis is largely invisible to the outside world. U.N. investigators managed to shine a little light into North Korea’s darkest corners last month.  [Click here to get to the U.N. report]

I’ve used similar photos in class.  It’s a powerful exercise.  North Korea is as dark as undeveloped and largely unpopulated areas of the Congo River Basin, the Australian Outback, the Arabian Peninsula’s “Empty Quarter,” and almost as dark as Antarctica.

No doubt stargazing is good in some of those dark spots in North Korea.  This is one case where the absence of light pollution does NOT indicate good planning, but instead an amazing paucity of rational development.

Beautiful Antarctica: Photos, or painting?

January 27, 2014

This one is cropping up all over the internet.

But just try to get a commitment as to its origins.  Photographic, or artist’s image?

I wagered the latter. Note general lack of thick clouds, angle of sunlight, etc.

Beautiful Antarctica from space. Photographic image, or artist's rendering?  Who deserves credit for the image?

Beautiful Antarctica from space. Photographic image, or artist’s rendering? Who deserves credit for the image?

Then, at Twisted Sifter (shout out to Annette Breedlove; and everyone outside my family will be mystified by that reference) I found this, the full image from NASA.  Notice how some selective editing, changing the perspective, makes the image above more fascinating — while stripping out the identifying credits:

Image via Twisted Sifter; NASA image of Antarctica, available at Flickr Commons

Image via Twisted Sifter; NASA image of Antarctica, available at Flickr Commons

Well, that’s a different thing, then.

Twisted Sifter’s explanation of details, excerpt:

Seen above is a view of the Earth on September 21, 2005 with the full Antarctic region visible. The composite image shows the sea ice on September 21, 2005, the date at which the sea ice was at its minimum extent in the northern hemisphere. The colour of the sea ice is derived from the AMSR-E 89 GHz brightness temperature while the extent of the sea ice was determined by the AMSR-E sea ice concentration. Over the continents, the terrain shows the average land cover for September, 2004. The global cloud cover shown was obtained from the original Blue Marble cloud data distributed in 2002. [Source]

Due to the position of Antarctica in relation to our Sun it would not look like this to the naked eye. This is a composite that shows what Antarctica looks like if the entire continent were illuminated.

Click here for the full resolution 8400×8400 pixel TIFF version (63 mb) and click here for the 8400 x 8400 px JPG version.

NASA’s details, from the Flickr file:

NASA on The Commons

Global View of the Arctic and Antarctic on September 21, 2005

Collection: NASA Scientific Visualization Studio Collection

Title: Global View of the Arctic and Antarctic on September 21, 2005

Instrument: Terra/MODIS

Instrument: Aqua/AMSR-E

Description: This image shows a view of the Earth on September 21, 2005 with the full Antarctic region visible.

Abstract: In support of International Polar Year, this matching pair of images showing a global view of the Arctic and Antarctic were generated in poster-size resolution. Both images show the sea ice on September 21, 2005, the date at which the sea ice was at its minimum extent in the northern hemisphere. The color of the sea ice is derived from the AMSR-E 89 GHz brightness temperature while the extent of the sea ice was determined by the AMSR-E sea ice concentration. Over the continents, the terrain shows the average landcover for September, 2004. (See Blue Marble Next Generation) The global cloud cover shown was obtained from the original Blue Marble cloud data distributed in 2002. (See Blue Marble:Clouds) A matching star background is provided for each view. All images include transparency, allowing them to be composited on a background.

Completed: 2007-02-08

Credit: *Please give credit for this visualization to* NASA/Goddard Space Flight Center Scientific Visualization Studio The Blue Marble data is courtesy of Reto Stockli (NASA/GSFC).

Studio: SVS

Animator: Cindy Starr (Lead)

Scientist: Ronald Weaver (University of Colorado)

Data Collected: AMSR-E Sea Ice: 2005-09-21; Blue Marble cloud layer 2002; Blue Marble Next Generation Seasonal Landcover 2004-09

UID: SPD-SCIVS-http://svs 000000/a003400/a0034 02/NSIDCimages__SPcl ouds.2158-IMAGE

Original url:


Visit for the most comprehensive compilation of NASA stills, film and video, created in partnership with Internet Archive.

The image, and it’s odyssey and story, are reminders that reality is often better than the made up stuff; and it’s wise to properly attribute stuff you borrow.  Is this just a cool image, or an opportunity for teachers to enrich the classroom and an argument for boosting NASA’s budget?


“Penetration however slight”: Remembering a good and noble hoax – the U.S.S. Pueblo, 46 years later

January 22, 2014

January 23 is the anniversary of the North Koreans‘ capture of the spy boat, U.S.S. Pueblo, in 1968 — a beginning of a momentous year for bad events.  The saga of the Pueblo and its crew, including especially Cmdr. Lloyd Bucher, is of special interest to me because it features a series of some of the grandest, best and most humorously American hoaxes ever perpetrated by imprisoned people against their captors and wardens.  This is one of the great Kilroy stories of American history.  It should not be forgotten.  Especially with the role North Korea plays in contemporary angst, the Pueblo episode should not be forgotten. This is an encore post, with new links added.

1968 brought one chunk of bad news after another to Americans. The year seemed to be one long, increasingly bad disaster. In several ways it was the mark of the times between the feel-good, post-war Eisenhower administration and the feel-good-despite-the-Cold-War Reagan administration. 1968 was depressing.

Lloyd M. Bucher

USN Cmdr. Lloyd M. Bucher (Photo credit: Wikipedia)

What was so bad? Vietnam manifested itself as a quagmire. Just when Washington politicians predicted an end in sight, Vietcong militia launched a nationwide attack in South Vietnam on the Vietnamese New Year holiday, Tet, at the end of January. Civil rights gains stalled, and civil rights leaders came out in opposition to the Vietnam war. President Johnson fared poorly in the New Hampshire primary election, and eventually dropped out of the race for the presidency (claiming he needed to devote time to making peace in Vietnam). Labor troubles roiled throughout the U.S., including a nasty strike by garbage collectors in Memphis. It didn’t help to settle the strike that the sanitation workers were almost 100% African American, the leadership of Memphis was almost 100% white, and race relations in the city were not so good as they might have been – the strike attracted the efforts of the Southern Christian Leadership Conference, and Martin Luther King, Jr. – who was assassinated there in early April. In response, riots broke out in 150 American cities.

More below the fold, including the key confession to “penetration.” Read the rest of this entry »

Can’t get it together; it IS together

January 2, 2014

Earth on January 1, 2014.  Looks pretty good from this angle.

Can we make it look this good down here on the ground?

NASA caption: Happy New Year! This image shows the Earth today, January 1, 2014, a few hours into the new year, as seen by the Geostationary Operational Environmental Satellites (GOES) satellite. Geostationary describes an orbit in which a satellite is always in the same position with respect to the rotating Earth. This allows GOES to hover continuously over one position on the Earth’s surface, appearing stationary. As a result, GOES provide a constant vigil for the atmospheric “triggers” for severe weather conditions such as tornadoes, flash floods, hail storms, and hurricanes. Image Credit: NASA/NOAA GOES Project #nasa #earth #space #goes #irl #today #happynewyear #planets #solarsystem #newyear #2014 #nye #home

More, perhaps related:

December 30, Hubble Day 2013: Look to the stars for our future

December 30, 2013

[Today is actually the day!  You may fly your flag if you choose.  This is the traditional Millard Fillmore's Bathtub Hubble Day post.]

Lift a glass of champagne today in tribute to Edwin Hubble and his great discovery. Not sure what to call it — Hubble Day, Looking Up Day, Endless Possibilities Day — whatever, this is the anniversary of Edwin Hubble’s announcement that he had discovered the universe is much, much larger than anyone had imagined, containing far more stars than anyone had dared guess.

It’s a big universe out there.

Ultraviolet image of the Andromeda Galaxy, first known to be a galaxy by Edwin Hubble on December 30, 1924 - Galaxy Evolution Explorer image courtesy NASA

Ultraviolet image of the Andromeda Galaxy, first known to be a galaxy by Edwin Hubble on December 30, 1924 – Galaxy Evolution Explorer image courtesy NASA

So, today is a good day to celebrate the universe in all it’s glory – December 30.

On December 30, 1924, Edwin Hubble announced he’d discovered other galaxies in distant space. Though it may not have been so clear at the time, it meant that, as a galaxy, we are not alone in the universe (whether we are alone as intelligent life is a separate question). It also meant that the universe is much, much bigger than most people had dared to imagine.

I keep trying to get people to celebrate.

In 2008 for Hubble Day, Wired picked up on the story (with a gracious link to 2007’s post here at the Bathtub). Wired includes several links to even more information, a good source of information. See Wired’s 2009 post here.

Hubble was the guy who showed us the universe is not only bigger than we imagined, it’s probably much bigger and much more fantastic than we can imagine. Hubble is the guy who opened our imaginations to the vastness of all creation.

How does one celebrate Hubble Day? Here are some suggestions:

  • Easier than Christmas cards: Send a thank-you note to your junior high school science teacher, or whoever it was who inspired your interest in science. Mrs. Hedburg, Mrs. Andrews, Elizabeth K. Driggs, Herbert Gilbert, Mr. Willis, and Stephen McNeal, thank you.
  • Rearrange your Christmas/Hanukkah/Eid/KWANZAA lights in the shape of the Andromeda Galaxy — or in the shape of any of the great photos from the Hubble Telescope (Andromeda Galaxy pictured above; Hubble images here)
    A few of the images from the Hubble Telescope

    A few of the images from the Hubble Telescope

  • Go visit your local science museum; take your kids along – borrow somebody else’s kids if you have to (take them along, too); this year, in Dallas, you can visit the Perot Museum of Nature and Science – it’s a doozy
  • Spend two hours in your local library, just looking through the books on astronomy and the universe
  • Write a letter to your senators and congressman; tell them space exploration takes a minuscule portion of our federal budget, but it makes us dream big; tell them we need to dream big, and so they’d better make sure NASA is funded well.  While you’re at it, put in a plug for funding Big Bird and the rest of public broadcasting, too.  Science education in this nation more and more becomes the science shows on NPR and PBS, watched by kids who learned to read and think by watching Big Bird.
  • Anybody got a good recipe for a cocktail called “The Hubble?” “The Andromeda?” Put it in the comments, please.  “The Hubble” should have bubbles in it, don’t you think?  What was it the good monk said?  He was working to make great wine, but goofed somewhere, and charged the wine with another dose of yeast.  When he uncorked the very first bottle of what would come to be called champagne, Benedictine Monk Dom Pierre Perignon said “I am drinking stars!”  Only in French.  In any case, a Hubble cocktail should have bubbles, some of Perignon’s stars.

The encore post, from 2007:

December 30, 1924, Edwin Hubble announced the results of his observations of distant objects in space.


Edwin Hubble

In 1924, he announced the discovery of a Cepheid, or variable star, in the Andromeda Nebulae. Since the work of Henrietta Leavitt had made it possible to calculate the distance to Cepheids, he calculated that this Cepheid was much further away than anyone had thought and that therefore the nebulae was not a gaseous cloud inside our galaxy, like so many nebulae, but in fact, a galaxy of stars just like the Milky Way. Only much further away. Until now, people believed that the only thing existing outside the Milky Way were the Magellanic Clouds. The Universe was much bigger than had been previously presumed.

Later Hubble noted that the universe demonstrates a “red-shift phenomenon.” The universe is expanding. This led to the idea of an initial expansion event, and the theory eventually known as Big Bang.

Hubble’s life offered several surprises, and firsts:

Hubble was a tall, elegant, athletic, man who at age 30 had an undergraduate degree in astronomy and mathematics, a legal degree as a Rhodes scholar, followed by a PhD in astronomy. He was an attorney in Kentucky (joined its bar in 1913), and had served in WWI, rising to the rank of major. He was bored with law and decided to go back to his studies in astronomy.

In 1919 he began to work at Mt. Wilson Observatory in California, where he would work for the rest of his life. . . .
Hubble wanted to classify the galaxies according to their content, distance, shape, and brightness patterns, and in his observations he made another momentous discovery: By observing redshifts in the light wavelengths emitted by the galaxies, he saw that galaxies were moving away from each other at a rate constant to the distance between them (Hubble’s Law). The further away they were, the faster they receded. This led to the calculation of the point where the expansion began, and confirmation of the big bang theory. Hubble calculated it to be about 2 billion years ago, but more recent estimates have revised that to 20 billion years ago.

An active anti-fascist, Hubble wanted to joined the armed forces again during World War II, but was convinced he could contribute more as a scientist on the homefront. When the 200-inch telescope was completed on Mt. Palomar, Hubble was given the honor of first use. He died in 1953.

“Equipped with his five senses, man explores the universe around him and calls the adventure Science.”

That news on December 30, 1924, didn’t make the first page of the New York Times. The Times carried a small note on February 25, 1925, that Hubble won a $1,000 prize from the American Academy for the Advancement of Science.

(Does anyone have a suitable citation for that video? Where did it come from? Who produced it? Is there more somewhere?)

Happy Hubble Day! Look up!


Hubble Space Telescope - NASA image

Hubble Space Telescope, working homage to Edwin Hubble – NASA image

Even More Resources:

December 27, Great Beginnings Day: Darwin, Apollo, and more

December 27, 2013

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 December 27 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. has a great write up from Alex Pasternack, especially concerning the famous photo taken a few days prior to splashdown:

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 43 [45] years ago, the three astronauts of Apollo 8 became the first humans to orbit another celestial object. As they came around the dark side of the Moon 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.

Plan to raise a glass today, December 27, 2012, to Great Beginnings Day for the human race. December 27 is a day we should remember, for these achievements.

Also on December 27:

Adapted from a post from 2010.


NASA’s photo of the day the Earth smiled

November 13, 2013

NASA's caption:  On July 19, 2013, in an event celebrated the world over, NASA's Cassini spacecraft slipped into Saturn's shadow and turned to image the planet, seven of its moons, its inner rings -- and, in the background, our home planet, Earth. Image Credit:  NASA/JPL-Caltech/SSI

NASA’s caption: On July 19, 2013, in an event celebrated the world over, NASA’s Cassini spacecraft slipped into Saturn’s shadow and turned to image the planet, seven of its moons, its inner rings — and, in the background, our home planet, Earth. Image Credit: NASA/JPL-Caltech/SSI

It’s difficult to improve on NASA’s matter-of-fact explanations.

The Day the Earth Smiled

On July 19, 2013, in an event celebrated the world over, NASA’s Cassini spacecraft slipped into Saturn’s shadow and turned to image the planet, seven of its moons, its inner rings — and, in the background, our home planet, Earth.

With the sun’s powerful and potentially damaging rays eclipsed by Saturn itself, Cassini’s onboard cameras were able to take advantage of this unique viewing geometry. They acquired a panoramic mosaic of the Saturn system that allows scientists to see details in the rings and throughout the system as they are backlit by the sun. This mosaic is special as it marks the third time our home planet was imaged from the outer solar system; the second time it was imaged by Cassini from Saturn’s orbit; and the first time ever that inhabitants of Earth were made aware in advance that their photo would be taken from such a great distance.

With both Cassini’s wide-angle and narrow-angle cameras aimed at Saturn, Cassini was able to capture 323 images in just over four hours. This final mosaic uses 141 of those wide-angle images. Images taken using the red, green and blue spectral filters of the wide-angle camera were combined and mosaicked together to create this natural-color view. A brightened version with contrast and color enhanced, a version with just the planets annotated, and an unannotated version are also available.

This image spans about 404,880 miles (651,591 kilometers) across.

The outermost ring shown here is Saturn’s E ring, the core of which is situated about 149,000 miles (240,000  kilometers) from Saturn. The geysers erupting from the south polar terrain of the moon Enceladus supply the fine icy particles that comprise the E ring; diffraction by sunlight gives the ring its blue color. Enceladus (313 miles, or 504 kilometers, across) and the extended plume formed by its jets are visible, embedded in the E ring on the left side of the mosaic.

At the 12 o’clock position and a bit inward from the E ring lies the barely discernible ring created by the tiny, Cassini-discovered moon, Pallene (3 miles, or 4 kilometers, across). (For more on structures like Pallene’s ring, see PIA08328). The next narrow and easily seen ring inward is the G ring. Interior to the G ring, near the 11 o’clock position, one can barely see the more diffuse ring created by the co-orbital moons, Janus (111 miles, or 179 kilometers, across) and Epimetheus (70 miles, or 113 kilometers, across). Farther inward, we see the very bright F ring closely encircling the main rings of Saturn.

Following the outermost E ring counter-clockwise from Enceladus, the moon Tethys (662 miles, or 1,066 kilometers, across) appears as a large yellow orb just outside of the E ring. Tethys is positioned on the illuminated side of Saturn; its icy surface is shining brightly from yellow sunlight reflected by Saturn. Continuing to about the 2 o’clock position is a dark pixel just outside of the G ring; this dark pixel is Saturn’s Death Star moon, Mimas (246 miles, or 396 kilometers, across). Mimas appears, upon close inspection, as a very thin crescent because Cassini is looking mostly at its non-illuminated face.

The moons Prometheus, Pandora, Janus and Epimetheus are also visible in the mosaic near Saturn’s bright narrow F ring. Prometheus (53 miles, or 86 kilometers, across) is visible as a faint black dot just inside the F ring and at the 9 o’clock position. On the opposite side of the rings, just outside the F ring, Pandora (50 miles, or 81 kilometers, across) can be seen as a bright white dot. Pandora and Prometheus are shepherd moons and gravitational interactions between the ring and the moons keep the F ring narrowly confined. At the 11 o’clock position in between the F ring and the G ring, Janus (111 miles, or 179 kilometers, across) appears as a faint black dot. Janus and Prometheus are dark for the same reason Mimas is mostly dark: we are looking at their non-illuminated sides in this mosaic.  Midway between the F ring and the G ring, at about the 8 o’clock position, is a single bright pixel, Epimetheus. Looking more closely at Enceladus, Mimas and Tethys, especially in the brightened version of the mosaic, one can see these moons casting shadows through the E ring like a telephone pole might cast a shadow through a fog.

In the non-brightened version of the mosaic, one can see bright clumps of ring material orbiting within the Encke gap near the outer edge of the main rings and immediately to the lower left of the globe of Saturn. Also, in the dark B ring within the main rings, at the 9 o’clock position, one can see the faint outlines of two spoke features, first sighted by NASA’s Voyager spacecraft in the early 1980s and extensively studied by Cassini.

Finally, in the lower right of the mosaic, in between the bright blue E ring and the faint but defined G ring, is the pale blue dot of our planet, Earth. Look closely and you can see the moon protruding from the Earth’s lower right. (For a higher resolution view of the Earth and moon taken during this campaign, see PIA14949.) Earth’s twin, Venus, appears as a bright white dot in the upper left quadrant of the mosaic, also between the G and E rings.  Mars also appears as a faint red dot embedded in the outer edge of the E ring, above and to the left of Venus.

For ease of visibility, Earth, Venus, Mars, Enceladus, Epimetheus and Pandora were all brightened by a factor of eight and a half relative to Saturn. Tethys was brightened by a factor of four. In total, 809 background stars are visible and were brightened by a factor ranging from six, for the brightest stars, to 16, for the faintest. The faint outer rings (from the G ring to the E ring) were also brightened relative to the already bright main rings by factors ranging from two to eight, with the lower-phase-angle (and therefore fainter) regions of these rings brightened the most. The brightened version of the mosaic was further brightened and contrast-enhanced all over to accommodate print applications and a wide range of computer-screen viewing conditions.

Some ring features — such as full rings traced out by tiny moons — do not appear in this version of the mosaic because they require extreme computer enhancement, which would adversely affect the rest of the mosaic. This version was processed for balance and beauty.

This view looks toward the unlit side of the rings from about 17 degrees below the ring plane. Cassini was approximately 746,000 miles (1.2 million kilometers) from Saturn when the images in this mosaic were taken. Image scale on Saturn is about 45 miles (72 kilometers) per pixel.

This mosaic was made from pictures taken over a span of more than four hours while the planets, moons and stars were all moving relative to Cassini. Thus, due to spacecraft motion, these objects in the locations shown here were not in these specific places over the entire duration of the imaging campaign. Note also that Venus appears far from Earth, as does Mars, because they were on the opposite side of the sun from Earth.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA’s Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo.

For more information about the Cassini-Huygens mission visit and .

Image credit: NASA/JPL-Caltech/SSI

Bigger image:

Cassini's view looking back from Saturn, on July 19, 2013, the day the Earth smiled. Click for much larger view.  NASA photo and annotations

Cassini’s view looking back from Saturn, on July 19, 2013, the day the Earth smiled. Click for much larger view. NASA photo and annotations

What do you think:  Tax money well spent?



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