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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| Octans The Octant |
A faint and obscure constellation containing the south celestial pole. It was introduced in the mid-eighteenth century by Nicolas L. de Lacaille and contains only one star brighter than fourth magnitude.
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