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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| Saturn Nebula Ngc 7009 |
A planetary nebula in the constellation Aquarius. Its unusual shape, with a faint partial outer ring, resembles the planet Saturn. The double ring may be the remains of separate shells thrown off by the central star.
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