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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| Keyhole Nebula Ngc 3372 |
A dark dust nebula near the centre of the Eta Carinae Nebula. The name comes from the shape. The eye of the keyhole is a bubble expanding at 40 km/s.
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