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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| G Star |
A star of spectral type G. G stars on the main sequence have temperatures in the range 4,900-6,000 K and are yellow in colour. Many absorption lines of neutral and ionized metals feature in the spectrum, and there are some molecular bands. The Sun is a typical dwarf G star; Capella is an example of a giant G star.
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