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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| Satellite Laser Ranging Slr |
A technique for measuring with a high degree of accuracy the rotation and gravitational field of the Earth. Trains of laser light pulses 4 centimetres long are beamed to special satellites from which they are reflected back. There are 30 satellite laser ranging stations around the world.
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