The term 'First Magnitude Star' refers to a star that is one of the brightest in the night sky. The two stars that fit this description are Spica (5 letters) and Fomalhaut (9 letters). Spica is a binary star located in the constellation Virgo, while Fomalhaut is a single star located in the constellation Piscis Austrinus. Both stars are visible to the naked eye and have an apparent magnitude of 1 or brighter.