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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| Setting Circles |
Graduated scales attached to the rotation axes of a telescope mounting that indicate the celestial coordinates of the point in the sky at which the telescope is pointed.
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