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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| Geocorona |
The outermost part of the Earth’s atmosphere, consisting of a halo of hydrogen gas that extends over a region extending to about 15 Earth radii.
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