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Mutual Attraction

Credit: Canada-France-Hawaii Telescope/Coelum
Monday, August 31, 2015: Globular cluster Messier 92 lies roughly 26,000 light years away in the constellation of Hercules. This celestial object contains…Read More »





hundreds of thousands of stars bound together by mutual gravitational attraction in a space 100 light years in diameter. Researchers have great interest in these clusters as they are the oldest stellar systems known in the universe, being 12 to 14 billion years old.

— Tom Chao    Less «
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