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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| Themis |
Asteroid 24, diameter 228 km, discovered in 1853 by A. de Gasparis. It is the prototype of a Hirayama family of C-type asteroids whose orbits have semimajor axes of 3.13 AU.
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