From: Coral Clark (coralc@exploratorium.edu)
Date: Tue Sep 25 2001 - 08:41:14 PDT
Date: Tue, 25 Sep 2001 08:41:14 -0700 From: Coral Clark <coralc@exploratorium.edu> Subject: crater causes Message-id: <p04320403b7d6542b25cc@[10.0.1.47]>
Craters on planets (including Earth) are caused by impacts by small
pieces of matter from space, either asteroids or comet fragments.
This material is left over from the formation of the Solar System.
For more information on impacters, check out this link:
http://spacelink.nasa.gov/Instructional.Materials/Curriculum.Support/Space.Science/.index.html
Click on "near Earth impact hazards"
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