sciencehabit writes: Science reports: Using the world's most powerful ground-based telescope, astronomers have identified the seven heaviest stars ever found. One of these "blue supergiants" has a mass equivalent to 300 of our Suns—or twice as much mass as prevailing theory said a star could acquire. All will eventually go supernova, but the type of explosion they will generate is unknown. They could form neutron stars or black holes or obliterate themselves.
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