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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| Reflector 2 |
An element in an optical, radio or other telescope, or any kind of instrument, the purpose of which is to reflect electromagnetic radiation or streams of particles.
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