Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.
There are 2759 entries in this glossary.| Term | Definition |
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| Runoff Channel |
A dry, branching river channel with many tributaries, found in the old uplands of Mars. These channels were presumably formed in an era when liquid water fell as rain on Mars.
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