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Vice President Pence announces the Trump Administration's plan to create the U.S. Space Force by 2020 during a speech at the Pentagon on Thursday. Chip Somodevilla/Getty Images hide caption

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Chip Somodevilla/Getty Images

NASA has named nine astronauts to crew the first test flights and missions of Boeing's CST-100 Starliner and SpaceX's Crew Dragon capsule. From left to right: Sunita Williams, Josh Cassada, Eric Boe, Nicole Mann, Christopher Ferguson, Douglas Hurley, Robert Behnken, Michael Hopkins and Victor Glover. NASA hide caption

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NASA

Engineer Daniel Schubert inspects lettuce at the German Aerospace Center in Bremen. Scientists there are developing greenhouses for a potential Mars colony. The first greenhouse is being tested in an inhospitable environment in the Antarctic. David Hecker/Getty Images hide caption

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David Hecker/Getty Images

This artist's-concept illustration depicts NASA's Psyche spacecraft which will carry a deep-space laser communications system. JPL-Caltech/Arizona State Univ./Space Systems Loral/Peter Rubin/NASA hide caption

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JPL-Caltech/Arizona State Univ./Space Systems Loral/Peter Rubin/NASA

Live High Definition Video From Mars? NASA Is Getting Ready

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Engineers next to NASA's James Webb Space Telescope at NASA's Johnson Space Center in Houston. Chris Gunn/NASA hide caption

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Chris Gunn/NASA

How To Pack A Space Telescope

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Astronomers have discovered a star, shown in an artist's rendition, that appears to be orbiting an invisible black hole with about four times the mass of the sun. L. Calçada/ESO hide caption

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L. Calçada/ESO

A photographer looks at the night sky to see the annual Geminid meteor shower in northern Italy in December 2015. This year's shower coincides with a close-range visit by its parent asteroid. Marco Bertorello/AFP/Getty Images hide caption

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Marco Bertorello/AFP/Getty Images

A virtual reality program developed by NASA could help scientists visualize the magnetic fields around the earth. NASA hide caption

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NASA

NASA Taps Young People To Help Develop Virtual Reality Technology

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The Apollo 11 space module floating above the moon. Next-generation space queries may tend toward the political: Do the extraterrestrial beings have political action committees? Are there extraterrestrial lobbyists? Keystone/Getty Images hide caption

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Keystone/Getty Images

Close Encounters With Congress?

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David Reitze of the California Institute of Technology and the executive director of the Laser Interferometer Gravitational-Wave Observatory, or LIGO, speaks at the National Press Club in Washington on Oct. 16. He talks of one of the most violent events in the cosmos, the collision of neuron stars, that was witnessed completely for the first time in August. Susan Walsh/AP hide caption

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Susan Walsh/AP

An annual space law moot court competition imagines a future legal case set in space, where issues of liability and sovereignty can get extra complicated. Stocktrek Images/Getty Images hide caption

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Stocktrek Images/Getty Images

An Accident On The Moon, Young Lawyers To The Rescue

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