NASA - National Aeronautics and Space Administration

The small rock in this picture is a meteorite that was picked up from the snow with germ-free tongs and put into a clean bag. Image Credit: NASA

      a rock that has fallen to Earth from outer space

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Sentences:
NASA scientists study meteorites that have landed on Earth.

A meteorite landed in our neighbor's backyard.

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More Information:
http://sse.jpl.nasa.gov/planets/profile.cfm?Object=Meteors&Display=Kids   →
http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/meteoroids.html   →