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Space Pictures This Week: Sun Halo, Saturn Crater, More

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Comet
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« on: September 02, 2011, 11:41:53 pm »



California Glow

Photograph courtesy NASA

City lights shine through the clouds in an astronaut's view of southern California and Mexico's Baja California snapped from the International Space Station (ISS) in August.

Earlier this month an unmanned Russian spacecraft bound for the ISS failed shortly after launch, prompting mission managers to postpone the next scheduled human trips to the orbital laboratory until the cause of the crash can be determined and addressed.

The crew currently on board will stay longer than planned, and partner space agencies are now debating whether to completely abandon ship when it's time to bring the astronauts home.

Published September 2, 2011
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Comet
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« Reply #1 on: September 02, 2011, 11:44:15 pm »



Stellar Birth

Image courtesy STScI/NOAO/NSF/U. Alaska/NASA

Young stars light up dense clouds of molecular gas in a recently released picture of a star-forming region in the constellation Orion. The image was created using the Mayall four-meter telescope at Kitt Peak National Observatory in Arizona.

Known as Orion A, the gas cloud features several Herbig-Haro objects, jets of material being shot from the poles of newborn stars. (See "New Hubble Videos Show Star Jets in Action—A First.")

Published September 2, 2011
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Comet
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« Reply #2 on: September 02, 2011, 11:45:14 pm »



Martian Mound

Image courtesy U. Arizona/NASA

A band of light-colored bedrock winds through a newly released picture of the floor of a Martian crater, as seen by NASA's Mars Reconnaissance Orbiter.

The image shows dark sand collected in low-lying areas, while the crests of wind-blown dunes create caterpillar-like shapes around the exposed bedrock.

Published September 2, 2011
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« Reply #3 on: September 02, 2011, 11:46:02 pm »



Solar Halo

Photograph by Shishir Rai, My Shot

A photographer uses trees to block the sun's direct glare and capture an image of a sun halo in the skies over Gangtok, India. The picture was recently submitted to National Geographic's My Shot.

Such rings around the sun are optical effects caused by sunlight shining through ice crystals in high-level clouds. (Also see "Light Pillar Pictures—Mysterious Sky Shows Explained.")
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« Reply #4 on: September 02, 2011, 11:46:44 pm »



Supermassive Pair

Image courtesy CXC/SAO/STScI/NASA

For the first time, astronomers have spotted a spiral galaxy, similar to our own Milky Way, that hosts not one but two supermassive black holes at its heart.

Released August 31, the picture above combines x-ray and optical images of the galaxy NGC 3993, which lies about 160 million light-years away. The inset (top right) shows just the x-ray image—captured by NASA's Chandra X-ray Observatory—which reveals the two black holes orbiting a mere 490 light-years apart.

The black hole pair is most likely the result of a merger between two galaxies of unequal mass more than a billion years ago.

Published September 2, 2011
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« Reply #5 on: September 02, 2011, 11:47:30 pm »



Titanic Crater

Image courtesy Caltech/NASA

A radar picture shows a 25-mile-wide (40-kilometer-wide) impact crater on Saturn's moon Titan—only the eighth crater yet found on the moon's surface. The image was released August 29 by scientists with NASA's Cassini mission.

While Saturn's other moons have many thousands of craters, such features are rare on Titan. For starters, the large moon's dense atmosphere burns up smaller impacting bodies before they can reach the surface.

The craters that do form are often hard to recognize or disappear entirely as they are eroded by geological processes, such as wind and possibly icy volcanism.

Published September 2, 2011
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« Reply #6 on: September 02, 2011, 11:52:19 pm »



Southern Sunrise

Photograph courtesy NASA

The rising sun highlights Earth's atmospheric layers in a high-resolution picture taken August 27 by astronaut Ron Garan from aboard the International Space Station. The picture was taken as the orbiting lab passed over Rio de Janeiro, Brazil, and Buenos Aires, Argentina.

Flying high above Earth, the ISS completes an orbit every 90 minutes, so astronauts see 16 sunrises each 24-hour day.

Published September 2, 2011
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