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Web Extra: Astronomers animate one of the largest galaxy clusters ever observed | Astronomy.com
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Web Extra: Astronomers animate one of the largest galaxy clusters ever observed

The South Pole Telescope and other observatories are studying one of the largest and strangest objects in the universe — the Phoenix Cluster.
RELATED TOPICS: STARS AND STAR CLUSTERS
Phoenix still
The Phoenix Cluster is the most powerful producer of X-rays and one of the largest objects in the universe. This NASA video animation demonstrates how huge numbers of stars take shape inside the cluster. Hot gas, shown in red, actually contains more ordinary matter than all of the other galaxies within the cluster combined. At the center of the Phoenix Cluster, a large elliptical galaxy lurks where the hot gas is ejected, giving off unprecedented levels of X-rays, which have been observed by the orbiting Chandra X-ray telescope. The animation shows how the gas quickly cools by changing to a blue color, and then flows inward along filaments, forming stars at a level never before seen in the central galaxy of a cluster.

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