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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| Alphonsine Tables |
A set of tables giving the positions of the Sun, Moon and planets, published in 1252 under the patronage of King Alphonso X of Castile. They were computed by a team of astronomers using the principles set out by Ptolemy in the Almagest but incorporating more recent observations. They were in use in Europe for nearly 400 years, until superseded by the work of Johannes Kepler, during which time they were the best available.
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