Dozens of new variable stars found in a dense globular cluster
Messier 54 as imaged by the Hubble Space Telescope. Credit: ESA/Hubble & NASA June 1, 2016 by Tomasz Nowakowski (Phys.org)—Located some 87,000 light years away, a dense globular cluster named Messier 54 (also known as NGC 6715) is a real gold mine for astronomers. Recently, an international team has discovered dozens of new variable stars …
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