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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| International Atomic Time Tai |
A continuous timescale resulting from analyses by the Bureau International des Poids et Mesures of atomic time standards in many countries.
See also: atomic clock.
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