New SETI Chief On Search For Extraterrestrials

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Before Liftoff, A Space Telescope Tours Earth

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Distant Chemistry Sparks Thoughts Of Life

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Six men will enter a fake interplanetary spaceship in Moscow, close the hatch, and then live inside it for more than 500 days. S. Corvaja/ESA hide caption

toggle caption S. Corvaja/ESA

Fake Mars Mission: 'Real World' Meets Space Travel

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Falcon 9 flight hardware goes through final integration at SpaceX's Cape Canaveral launch site in Florida. SpaceX hide caption

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Falcon 9: A Future Space Taxi?

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Image courtesy of the OSU RO and NAAPO

Listen To A Possible Signal From E.T.

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Solving The Riddle Of Why Matter Exists

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Heads Up, Citizen Scientists: The Moon Needs You!

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Lost: Planet-Sized Belt. If Found, Return To Jupiter

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At Launch Pad 39A at NASA's Kennedy Space Center in Florida, a technician performs a final check of space shuttle Atlantis' payload bay doors before they are closed for launch. Cory Huston/NASA hide caption

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Space shuttle Atlantis awaits blastoff on its launch pad as members of the media set up remote cameras for Friday's scheduled launch from Kennedy Space Center in Florida to the International Space Station. Matt Stroshane/Getty Images hide caption

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The First Last Flight Of Space Shuttle Atlantis

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First Moonwalker Criticizes Obama's Space Plan

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This illustration shows the asteroid 24 Themis flanked by two small fragments that broke off following a crash more than 1 billion years ago. The bottom fragment's cometlike tail comes from the sublimation of ice from its surface. Gabriel Perez, Servicio MultiMedia, Instituto de Astrofisica de Canarias, Tenerife, Spain hide caption

toggle caption Gabriel Perez, Servicio MultiMedia, Instituto de Astrofisica de Canarias, Tenerife, Spain

Frosty Asteroid May Give Clues About Earth's Oceans

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