Proxima Centauri: Alpha's sibling? (researchers claim that Proxima Centauri may not orbit Alpha Centauri)

Science News | March 27, 1993| | Copyright

Generations of astronomy students have learned that the red dwarf star Proxima Centauri, the sun's closest stellar neighbor, tours the galaxy locked in a gravitational embrace with Alpha Centauri, a binary star system that shines in the southern hemisphere constellation Centaurus.

Now, two British astronomers are challenging this astronomical tenet. Their recalculation of Proxima's motion through space -- based on a widely quoted 1967 measurement--undermines the observational evidence that Proxima orbits Alpha Centauri, a pair of middle-aged stars similar in age and ...

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