infinity-imagined:Super Star Cluster Westerlund 2. This cluster is so massive that it is expected t
infinity-imagined:Super Star Cluster Westerlund 2. This cluster is so massive that it is expected to eventually evolve into a globular cluster. It hosts a dozen O-class hypergiant stars, each one with a luminosity 30,000 - 1,000,000 times greater than that of our Sun. -- source link
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