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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| Kepler’s Star |
A supernova in the constellation Ophiuchus in October 1604. It was observed and its position determined by Johannes Kepler. It reached a maximum magnitude of about -2.5 and the light curve shows it to have been a Type I supernova. The remnant is a source of radio emission, and a faint optical remnant has also been identified.
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