Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Mimosa or Becrux is the second brightest star in the constellation Crux and is one of the brightest stars in the night sky. Beta Crucis is located approximately 350 light years away from Earth. It is a spectroscopic binary with components that are too close together to resolve with a telescope. The pair orbit each other every 5 years and are separated by about 8 AU. Beta Crucis, being of spectral type B0.5IV, is believed to be the hottest first-magnitude star.