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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| B Star |
A star of spectral type B. B stars have surface temperatures in the range 11,000 - 25,000 K and are bluish white in colour. The most prominent features in their spectra are absorption lines of neutral helium. The Balmer lines of hydrogen are also present, being stronger the cooler the star. Examples of B stars are Rigel and Spica.
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