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 |
|---|---|
| Guide Star |
A star on which the manual or automatic guidance system of a telescope can be locked in order to ensure that some fainter object being observed is correctly followed as the Earth rotates.
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