Acrux is the 13th brighest star seen from earth. It owes it's brightness to its extremely high temperature (40,000 F) and it's size (Diameter = 7.3 million miles). Due to its high temperature and size the star gives off a blue/white color. According to scientests the star is classified as a blue giant stara hot star and is approximately 4 times hotter than the sun! Since this star is visible to the unaided eye this means the star is in our galaxy (320 light years).
The name of the star was created using the Bayer system. The star is designated by any Greek letter followed by the latin name of its corresponding constellation. For this star the letter Alpha (a) was paired with the constellation cross (crucis).