X-ray image of the Hydra A Cluster of galaxies

X-ray image of the Hydra A Cluster of galaxies

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Credit: DR WILLIAM HSIN-MIN KU/SCIENCE PHOTO LIBRARY

Caption: X-ray image taken with the Einstein Observatory satellite of the Hydra A Cluster of galaxies. The strength of the X-ray emission runs from red up to white for the brighter regions. The X-ray image does not show the single galaxies, as the optical images, but reveals a huge region of gas permeating all the cluster. The temperature of the gas is about 100 million degrees and is invisible except to the X-ray telescopes.

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Keywords: astronomy, cluster, cluster of, cosmology, einstein observatory imagery, galactic, galaxies, galaxy, galaxy clustr, group, hydra a cluster, science, x-ray astronomy, xray

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