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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| Delta Scuti Star δ Sct Star |
A short-period pulsating variable star. Delta Scuti, found to be variable in 1935, is the prototype of the group. Typically, the periods are less than eight hours and the variation amounts to only a few hundredths of a magnitude, which is imperceptible to the naked eye. Stars of this type are also known as dwarf Cepheids or AI Velorum stars.
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