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- proper n. The brightest star in the southern constellation of Centaurus. Alpha Centauri is actually a binary star with Proxima Centauri as a third component. Alpha Centauri B is less bright than Alpha Centauri A and is somewhat less bright than our sun.
Astronomers are looking at Alpha Centauri B to see whether this bright, calm star will reveal Earth-like worlds around it.
The results are "encouraging" for the case of Alpha Centauri B, the scientists said.
Alpha Centauri is a binary star system consisting of Alpha Centauri A and Alpha Centauri B, which to the unaided eye, appears as a single star.
Two teams of astronomers, one from the United States and one from Europe, are in a race to find a planet orbiting our near neighbors Alpha Centauri A and Alpha Centauri B, twin stars that appear from Earth as a single point of light.