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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| Magellanic Stream |
A long streamer of neutral hydrogen gas apparently spanning the 200,000 light years between the Magellanic Clouds and our own Galaxy. It forms an arc 150° long in the southern sky. A possible explanation is that it is gas dragged from the Magellanic Clouds in a tidal interaction with the Galaxy.
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