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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| Element Orbital |
orbital elements.
Those most commonly used for the orbits of planets and comets around the Sun are semimajor axis, perihelion distance, eccentricity, inclination, argument of perihelion, longitude of the ascending node and period .
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