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Rights: Glen Youman, CC BY-SA 3.0 Published 17 September 2009 Size: 150 KB

Massive stars, more than 3 times the mass of the Sun, mostly convert hydrogen into helium. Rigel is the brightest star in the constellation called Orion and one of the brightest stars in the sky. It is a blue (very hot) supergiant, over 100 times bigger than the Sun.

Acknowledgement: Glen Youman