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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| Saha Equations |
A set of mathematical expressions, formulated in 1920 by the Indian physicist Megh Nad Saha, from which can be calculated the numbers of atoms in each of the possible ionization states for atoms and electrons in thermodynamic equilibrium at a particular temperature. They are important in interpreting stellar spectra and the conditions in stellar atmospheres.
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