Bellatrix (Gamma Orionis) is the third brightest star in the constellation Orion and the twenty-seventh brightest star in the nighttime sky. It is 240 light-years from earth. The name Bellatrix is Latin for female warrior. It is also known as the Amazon Star or Gamma Orionis. It was once thought to belong to the physical association of stars that comprise much of the constellation of Orion. But this is no longer believed to be the case, as Gamma Orionis is much closer to us than the rest of the group.

When viewed from Earth, it is the third brightest star in the constellation. (TNG: "Family"). Upon initially boarding USS Voyager, in 2371, Captain Kathryn Janeway was quizzed by Admiral Patterson on this subject, referring to the star as "Gamma Orionis or Bellatrix if you prefer the original Arabic name." (VOY: "Relativity"). Janeway refers to Bellatrix as the original Arabic name for this star, however, the name "Bellatrix" is actually Latin in origin and means "Amazon". It is also known as the Amazon Star and the "warrior woman". The real Arabic name for this star was al Najid, "the conqueror."

Historically this star was used as a luminosity standard that astronomers could compare with other stars to check for variability. But it was later discovered that Bellatrix itself is an eruptive variable, changing in luminosity by a few percent over time. It ranges in magnitude from 1.59 to 1.64.