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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| Sedimentary Rock |
A rock made of fragments of pre-existing rock or, on Earth, the hard parts of dead organisms that have been deposited as a sheet, for example on a sea-bed.
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