Astronomy. a triple-star system that is the brightest celestial object in the constellation Centaurus.
The Letter B Once Had A Much Longer NameThe letter B was part of the Phoenician alphabet more than 3000 years ago in 1000 BCE. At that time, the letter was called beth and looked a little different, but it made the sound of b and was second in the alphabet. The shape of the letter resembled the floor plan of a house, and the word beth meant “house.” This is pictured below. In Hebrew, the letter was called beth, bet, or bayt which also …
Origin of Alpha Centauri
< New Latin: Alpha of Centaurus
Also called Rigel Kentaurus.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Science definitions for alpha centauri
[ ăl′fə sĕn-tôr′ē ]
A triple star system in the constellation Centaurus that is the third brightest star in the night sky, with an apparent magnitude of -0.27, and the star nearest to Earth, at a distance of about 4.2 light-years. The two brighter stars, Alpha Centauri A and B, form a binary star system, which is orbited by Proxima Centauri, a smaller, dimmer star.
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