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Image of the Day
First Image of the Moon Taken by a U.S. Spacecraft

July 31, 2014

Ranger 7 took this image, the first picture of the moon by a U.S. spacecraft, on July 31, 1964 at ...

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Interactive Satellite Tracker
Interactive Satellite Tracker

Interactive Satellite Tracker (iSat) is a browser-based application that allows you to track all NASA Science Satellite Missions, as well as other satellites. Enjoy this free tool at home or in the classroom!

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Latest ScienceCast
Perseid Meteors vs the Supermoon YouTube Video

Which is brighter--a flurry of Perseid fireballs or a supermoon?

Watch our latest ScienceCast: Perseid Meteors vs the Supermoon