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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| Terra Pl. Terrae |
An extensive land mass on a planetary surface. The lighter-coloured highland areas of the Moon are sometimes called terrae in contrast with the darker mare areas.
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