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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| Magnetotail |
The part of the magnetosphere of the Earth, or of any other planet, which on the planet’s nightside extends like a comet tail in the direction opposite the Sun. The Earth’s magnetotail extends from around 8 to 10 Earth radii distant on the nightside, to 80, and perhaps as far as 1,000, Earth radii.
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