Pollux (star)

star in the northern constellation of Gemini

Pollux is an orange giant star. It is the brightest star in the Gemini constellation. It's diameter is over 11,000,000 kilometres (6,800,000 miles).[1] Once a type A star, Pollux has used all the hydrogen in its core and expanded to become a giant.[2]


  1. Döllinger, M. P.; Paulson, D. B.; Esposito, M.; Hartmann, M.; Yang, S.; Walker, G. a. H.; Saar, S. H.; Guenther, E. W.; Endl, M.; Cochran, W. D.; Hatzes, A. P. (1 October 2006). "Confirmation of the planet hypothesis for the long-period radial velocity variations of β Geminorum". Astronomy & Astrophysics. 457 (1): 335–341. doi:10.1051/0004-6361:20065445 – via www.aanda.org.
  2. Power, J.; Folsom, C. P.; Eck, S. Van; Cabanac, R.; Alecian, E.; Donati, J.-F.; Petit, P.; Roudier, T.; Weiss, W. W.; Catala, C.; Charbonnel, C.; Konstantinova-Antova, R.; Wade, G. A.; Aurière, M. (1 September 2009). "Discovery of a weak magnetic field in the photosphere of the single giant Pollux". Astronomy & Astrophysics. 504 (1): 231–237. doi:10.1051/0004-6361/200912050 – via www.aanda.org.