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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| Ejecta |
Material that has been excavated during an impact or thrown out by volcanic activity and thus redistributed. Ejecta typically forms a circular blanket of shattered rock fragments and solidified gas and liquid droplets around the impact or volcanic centre. Some impact ejecta can escape from the planet or satellite altogether.
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