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Proxima Centauri

Proxima Centauri

A Dictionary of Astronomy | 1997 | Copyright

Proxima Centauri The closest star to the Sun, 4.22 l.y. away, the third member of the Alpha Centauri system. It is an M5 dwarf of magnitude 11.0, but is also a flare star and undergoes sudden brightness increases of up to 1 mag. lasting several minutes. Intrinsically it is 20 000 times fainter than the Sun. It is thought to be gravitationally bound to the other two members of Alpha Centauri, which lie 0.17 l.y. farther away. Its orbital period around them must be a million years or more.
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Proxima Centauri

World Encyclopedia | 2005 | Copyright

Proxima Centauri Nearest star to the Sun, slightly closer than the nearby star Alpha Centauri. Long thought to be part of the Alpha Centauri system, some astronomers now believe it to be an unrelated star making a close approach.
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Proxima Centauri

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

Proxima Centauri see Alpha Centauri .

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