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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| Geomagnetic Storm |
A large decrease, typically of a few hours’ duration, in the horizontal component of the Earth’s magnetic field. The cause is the arrival in the vicinity of the Earth of electrically charged particles plasma from the Sun, generated usually by a solar flare. Auroral activity and disruption of radio communications are common during such storms.
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