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Portrait of a Doomed Asteroid

Sagittarius A

A new study provides a possible explanation of mysterious X-ray flares detected by the Chandra K-ray Observatory for several years in the region of Sagittarius A*, or Sgr A*. The study suggests a ...

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NASA's Space Communications Testbed

NASA's Space Communications Testbed

In this image from late 2010, software engineers worked in the background as Glenn Research Center technician, Joe Kerka, rotated the SCaN Testbed flight enclosure assembly. The Space Communications ...

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Full Moon Over Washington

Full Moon Over Washington

A United States Marine Corps helicopter is seen flying through this scene of the full moon and the U.S. Capitol on Tuesday, Feb. 7, 2012, from Arlington National Cemetery.

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