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News Picks : Star cluster in Milky Way may have come from a different galaxy

By: Physics Today
Fri Nov 20 13:05:00 UTC 2015
New Scientist: Much younger and more distant than any other globular star cluster in the Milky Way, the Crater cluster was discovered two years ago by researchers using the Hubble Space Telescope. At just 7.5 billion years old, the cluster is thought to have been plucked from the Small Magellanic Cloud (SMC), a nearby galaxy some 200 000 light-years from Earth, because the SMC’s other globular clusters are of a similar age. Further evidence is the cluster’s location, speed, and chemical composition, which are similar to those of other clusters in the SMC.

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