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Hydra A

Hydra A
(Image and Text Credit: NASA/CXC/SAO)

Hydra A is a galaxy cluster that is 840 million light years from Earth (redshift = .054). The cluster gets its name from the strong radio source, Hydra A, that originates in a galaxy near the center of the cluster. Optical observations show a few hundred galaxies in the cluster. Chandra X-ray observations reveal a large cloud of hot gas that extends throughout the cluster. The gas cloud is several million light years across and has a temperature of about 40 million degrees in the outer parts decreasing to about 35 million degrees in the inner region. Chandra X-ray Observatory

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Last modified: Thursday, 26-Jun-2003 13:48:46 EDT