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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| Guide Telescope |
A telescope on the same mounting as one being used for photography or with instruments, provided for the purpose of guiding the telescope accurately during the course of an observation.
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