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 |
|---|---|
| Major Planet |
Any of the nine planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune or Pluto. The term minor planet is used interchangeably with asteroid.
|