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Former astronaut Chris Cassidy raises hand for My Hand My Cause photo

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Are black holes time machines? Yes, but there's a catch

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Very Large Telescope photographs its lightest ever exoplanet

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February's new moon makes this a great night to view the Winter Triangle

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Hubble telescope captures dazzling stellar duo in Orion Nebula (photo)

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Inside SyFy's 'The Ark': Creator Dean Devlin on his spirited new sci-fi survival series (exclusive)

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China to send 2 astronaut crews, 1 cargo ship to Tiangong space station this year

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Hidden lights on the sun could help crack solar atmosphere mystery

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Meet the SpaceX Crew-6 astronauts launching to the International Space Station on Feb. 26

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Space debris apocalypse: 6 objects that could wreak havoc in Earth's orbit

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Surprise! Colliding neutron stars create perfectly spherical 'kilonova' explosions

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