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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| Effective Area |
A parameter that expresses how effective a radio telescope is at absorbing radiation of a particular frequency and from a particular direction, and at making the power available for measurement.
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