The supergiant, spinning wildly, may have already eaten its neighbor. 😯
. That star cluster — 5,000 lightyears from Earth — is easily the largest in our part of the Milky Way galaxy.Cygnus OB2 isn’t just close, it’s also exciting. The researchers describe the stellar nursery as ”one of the most powerful star-forming regions” near the Sun. It’s packed with young, very big stars that burn extremely hot.
When the researchers took a close look five years ago, they found 42 massive stars that had been hidden behind huge clouds of gas and dust. The bright star would be easily visible from Earth, but the gas reduces the visible light by a factor of roughly 10,000,Of the 42 gigantic stars they found in the cluster, 20395358+4222505 turned out to be the largest.The researchers were taken by surprise in three big ways. First was the sheer size of 20395358+4222505.
Eventually, the star will transform into a blue hypergiant. Researchers don't know much about them as they're so rare. Finally, the researchers couldn't believe that 20395358+4222505 changed speeds dramatically over the handful of days they observed it. It was traveling roughly 130,000 miles per hour faster on the first day of observation than the second. There are two potential explanations for the incredible discrepancy, the researchers say. Either it's in a binary system with another star, or with a very dense object, like a neutron star or a black hole.
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