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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| Air Shower |
A proliferation of high-energy charged particles in the atmosphere, triggered by the collision of a cosmic ray particle with an atomic nucleus in the atmosphere. The first collision produces a number of secondary particles, all of which have considerable energy and may subsequently undergo further collisions.
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