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Image of the Day
Hubble Sweeps a Messy Star Factory

December 19, 2014

This sprinkle of cosmic glitter is a blue compact dwarf galaxy known as Markarian 209. Galaxies of this type are ...

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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