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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| Finder |
A small telescope attached to the tube of a larger instrument, used for locating the correct field of view. A finder usually incorporates a cross-wire and is aligned so that an object located on the cross-wire appears centrally in the smaller field of view of the main telescope.
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