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 Years Of The Quiet Sun Iq |
The period 1964-5 when, following the success of the earlier International Geophysical Year, an international programme of geophysical research was coordinated to coincide with a period of minimum solar activity.
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