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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| Danjon Scale |
A scale devised by the French astronomer André Danjon 1890-1967 to describe the relative darkness of the Moon during a total lunar eclipse. The scale runs from 0 zero, for a very dark eclipse, to 4, representing an eclipse in which the Moon is a very bright copper colour or orange.
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