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Pick a Postcard - Asteroids


This is an image of the asteroid Gaspra from Galileo on October 29, 1991.
Courtesy of NASA

This is a comparison of Gaspra (top) with Mars' two satellites, Deimos (lower left) and Phobos (lower right).
Courtesy of NASA

This is an image of the asteroid Ida seen by Galileo on its way to Jupiter on August 28, 1993.
Courtesy of NASA/JPL

This is a color image of Ida and its moon, Dactyl.
Courtesy of NASA

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF