Alnitak (Zeta Orionis): a bright multiple star in Orion's Belt Alnitak Alnitak (Zeta Orionis) is a luminous multiple-star system in Orion's Belt. Its hot O-type primary and close companions illuminate nearby nebulae and serve as a laboratory for massi…
Alpha Herculis (Rasalgethi) Alpha Herculis Alpha Herculis, or Rasalgethi, is a red giant multiple star system and the brightest star in Hercules, known for its orange-red color and traditional Arabic name.
