1. Rigel (Beta Orionis): The brightest star in Orion, and the seventh brightest star in the night sky.

2. Betelgeuse (Alpha Orionis): A red supergiant star that is the second brightest star in Orion and the tenth brightest in the night sky.

3. Bellatrix (Gamma Orionis): A blue-white giant star, the third brightest in Orion.

4. Saiph (Kappa Orionis): A blue supergiant star, the fourth brightest in Orion.