Fomalhaut is the brightest star in the constellation Piscis Austrinus and one of the brightest stars in the sky. Published: Oct. 4, 2013 at 5:09 PM. ROCHESTER, N.Y., Oct. 4 - The nearby star system Fomalhaut, with its exoplanet and dusty debris disk, is not just a double star, it's an unusual triple star, a U.S astronomer reports. Eric Mamajek, a professor of physics and astronomy at the University of Rochester, and his collaborators found a star significantly distant from the Fomalhaut pair is in fact part of a three star system. "Fomalhaut A is such a massive star, about twice the mass of our Sun, that it can exert sufficient gravitational pull to keep this tiny star bound to it - despite the star being 158,000 times farther away from Fomalhaut than the Earth is from the Sun," he said.
Source: http://www.upi.com/Science_News/2013/10/04/Nearby-binary-star-system-gets-officially-confirmed-third-member/UPI-24561380920978/
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