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 |
|---|---|
| Node |
Either of the points on the celestial sphere where the plane of an orbit intersects a reference plane. The position of a node is one of the orbital elements used to specify the orientation of an orbit.
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