Definition of Fomalhaut
: a white star of the first magnitude that is the brightest star in the constellation Piscis Austrinus An orbiting infrared telescope has found a ring of planets being born around Fomalhaut, a much-studied star in the Southern Hemisphere about 22.8 light years from Earth. — International Wildlife, May/June 1984 —called also Alpha Piscis Austrini
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First Known Use of fomalhaut
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