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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| Local Hour Angle Lha |
The hour angle of a celestial object as measured by an observer at a particular locality. The local hour angle of an object at any instant varies according to the longitude of the observer.
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