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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| Heterodyne Spectrometer |
An instrument used in microwave astronomy to measure the strength of the cosmic background radiation by switching a detector rapidly between a stable reference source and the sky.
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