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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| Azimuth |
The angular distance of an object in the sky measured parallel to the horizon, eastwards from north. Azimuth is measured in degrees, from 0 to 360. It is one of the coordinates in the horizontal system which identifies the positions of celestial objects. Altitude is the other coordinate in this system.
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