Rare Milky Way star cluster is packed with red supergiants 1 million times brighter than the sun

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Many red supergiant monster stars lurk in a Milky Way cluster astronomers have discovered with the Gaia space telescope. The cluster, Barbá 2, could help understand why some stars become black holes.

Rare Milky Way star cluster is packed with red supergiants 1 million times brighter than the sun : Read more