Glossary term: Proxima Centauri

Redirected from Alpha Centauri

Description: Proxima Centauri, also known as Alpha Centauri C, is the nearest star to the Sun at a distance of 4.24 light years (1.302 parsecs), or about 40 trillion kilometers. It is a red dwarf star, smaller than the Sun in size and mass, and therefore too faint to be seen with the naked eye. At the time of writing, there is one confirmed planet that orbits Proxima Centauri. It has been designated Proxima Centauri b, and its orbit is in the so-called habitable zone of the star. Two additional candidates for planets, Proxima Centauri c and d, have not yet been confirmed. Together with Alpha Centauri A and B, Proxima Centauri forms the Alpha–Centauri star system, which is comprised of three gravitationally bound stars.

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