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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| Syrtis Major Planum Formerly Syrtis Maj |
A cratered volcanic plain on Mars, identified with a dark, triangular feature Syrtis Major easily visible in telescopic views of the planet. The name was officially changed from Planitia to Planum in 1982.
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