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 |
|---|---|
| Unidentified Flying Object Ufo |
Any phenomenon in the sky for which the observer does not have a ready rational explanation. The term is often used in connection with hypothetical manifestations of unnatural objects from space.
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