O-type stars compared to our sun (IMAGE)
Caption
The relative size of the sun (upper left) compared to two stars in binary system Wolf-Rayet 140. The O-type star is ~30 times the mass of the sun, and its companion is ~10 times the mass.
O-type stars are some of the biggest and brightest stars in the universe and live relatively short lives. Wolf-Rayet stars are O-type stars near the end of their life that release huge amounts of mass into space via stellar winds, exposing their hot, inner layers.
Credit
NASA/JPL-Caltech
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License
CC BY-SA