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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| Barlow Lens |
A diverging lens used in conjunction with a telescope eyepiece. The Barlow lens increases the effective focal length of the telescope, which causes the eyepiece to yield a higher magnification.
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