On March 29, 1807, German astronomer Heinrich Wilhelm Olbers spotted Vesta as a pinprick of light in the sky. Two hundred and four years later, as NASA’s Dawn spacecraft prepares to begin orbiting this intriguing world, scientists now know how special this world is, even if there has been some debate on how to classify it.

Many astronomers call Vesta …

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Every day about 100 tons of meteoroids — fragments of dust and gravel and sometimes even big rocks – enter the Earth’s atmosphere. Stand out under the stars for more than a half an hour on a clear night and you’ll likely see a few of the meteors produced by the onslaught. But where does all this stuff come from? …

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A Geminid fireball explodes over the Mojave Desert in 2009. Credit: Wally Pacholka / AstroPics.com / TWAN.

The Geminid meteor shower, which peaks this year on Dec. 13th and 14th, is the most intense meteor shower of the year. It lasts for days, is rich in fireballs, and can be seen from almost any point on Earth.

It’s also NASA …

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The Leonids, 2010

The annual Leonid Meteor Shower lasts from November 10 through the 23rd and peaks before dawn on November 17. Unfortunately, a Full Moon arrives on November 21, so its light will interfere with meteor watching until after midnight on preceding nights.

While it won’t compete with last year’s spectacular display, this year’s show still promises excitement. Observers under a dark …

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A pair of NASA spacecraft that were supposed to be dead a year ago are instead flying to the Moon for a breakthrough mission in lunar orbit.

“Their real names are THEMIS P1 and P2, but I call them ‘dead spacecraft walking,'” says Vassilis Angelopoulos of UCLA, principal investigator of the THEMIS mission. “Not so long ago, we thought they …

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This month, Comet Hartley 2 has put on a good show for backyard astronomers. The comet’s vivid green atmosphere and auburn tail of dust look great through small telescopes, and NASA’s Deep Impact/EPOXI probe is about to return even more dramatic pictures when it flies past the comet’s nucleus on Nov. 4th.


Comet 103P/hartley 2 photographed on Oct. 20th by

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NASA’S Hubble Captures First Images Of Aftermath Of Possible Asteroid Collision


These four Hubble Space Telescope images, taken over a five-month period, show the odd-shaped debris that likely came from a collision between two asteroids.

NASA’s Hubble Space Telescope has captured the first snapshots of a suspected asteroid collision. The images show a bizarre X-shaped object at the head of …

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NASA successfully launched the Lunar Crater Observation and Sensing Satellite, or LCROSS, Thursday on a mission to search for water ice in a permanently shadowed crater at the moon’s south pole. The satellite lifted off on an Atlas V rocket from Cape Canaveral Air Force Station, Fla., at 5:32 p.m. EDT, with a companion mission, the Lunar Reconnaissance Orbiter, or …

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Artist’s impression of exoplanet around a star Credits: ESA 2003. Illustration by AOES Medialab

The Corot satellite strikes again with another fascinating planet discovery. This time, the newly discovered gas giant planet may have an interior that closely resembles those of Jupiter and Saturn in our own Solar System.

Very few planets are temperate enough to allow the presence of …

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Close up image of crater Cabeus A near the moon’s south pole and show crater elevation. Yellow represents lower elevations. Credit: NASA/JPL

NASA has selected a final destination for its Lunar Crater Observation and Sensing Satellite, or LCROSS, after a journey of nearly 5.6 million miles that included several orbits around Earth and the moon. The mission team announced Wednesday …

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