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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| Jeans Length |
The minimum wavelength that a density perturbation in a gas cloud must have if it is to grow in response to gravitational forces. The concept is central to theories of star formation in interstellar clouds.
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