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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| Beta Decay |
Decay of a radioactive isotope resulting in the emission from the parent atomic nucleus of either an electron and an antineutrino, or a positron and a neutrino.
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