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Delta II Rocket With Soil Moisture Active Passive (SMAP) Mission Onboard

January 29, 2015

A worker is seen preparing the launch gantry to be rolled back from the United Launch Alliance Delta II rocket ...

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Balance Mass Challenge
Mars Balance Mass Challenge

The Mars Balance Mass Challenge seeks design ideas for small science and technology payloads that could potentially provide dual purpose as ejectable balance masses on spacecraft entering the Martian atmosphere.

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Latest ScienceCast
Embers from a Rock Comet: The 2014 Geminid Meteor Shower YouTube Video

Forecasters expect as many as 120 meteors per hour when the Geminid meteor shower peaks on Dec. 13-14.

Watch our latest ScienceCast: Embers from a Rock Comet: The 2014 Geminid Meteor Shower