Alpha Centauri

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Al·pha Cen·tau·ri

 (ăl′fə sĕn-tôr′ē)
n.
A multiple star in Centaurus, 4.4 light years from Earth, whose three components form the brightest object in the constellation and the third brightest star in the night sky.

Al′pha Centau′ri


n.
a triple-star system that is the brightest celestial object in the constellation Centaurus.
[< New Latin: Alpha of Centaurus]

Al·pha Cen·tau·ri

(ăl′fə sĕn-tôr′ē)
A multiple star consisting of three stars in the constellation Centaurus. It is the star nearest Earth, at a distance of 4.4 light-years, and it is the third brightest star in the night sky. ♦ Prox·i·ma Centauri (prŏk′sə-mə) is the individual star in this system that is closest to Earth, but it is very faint and far from the system's center of mass.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Alpha Centauri - brightest star in Centaurus; second nearest star to the sun
Centaurus, Centaur - a conspicuous constellation in the southern hemisphere near the Southern Cross
References in periodicals archive ?
On hearing from Johnson, he set about observing a Alpha Cen more intensively, using a transit telescope to measure Right Ascension and a mural circle to measure declination.
3 light-years for Alpha Cen AB), Barnard's Star (5.
Alpha Cen Bb's original detection, made by Xavier Dumusque (now at the Harvard-Smithsonian Center for Astrophysics) and colleagues, was a heroic effort to strip away all sources of "jitter.
The spectacular, zero-magnitude double star Alpha Cen AB, and its faint, red-dwarf tag-along Alpha Cen C (Proxima Centauri) 2[degrees] to one side, are so far south at about declination -61[degrees] that they're forever out of sight north of Miami or thereabouts.