Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)
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Abell 665  Galaxy Cluster (distance: 2 billion light years), Roland Schliessus
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Abell 665 Galaxy Cluster (distance: 2 billion light years)

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Abell 665  Galaxy Cluster (distance: 2 billion light years), Roland Schliessus
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Abell 665 Galaxy Cluster (distance: 2 billion light years)

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Description

This particular cluster (distance: 2 billion light years) is called Abell 665. It was named after its discoverer, George O. Abell, who included it in his seminal 1958 cluster catalogue. Abell 665 is located in the well-known northern constellation of Ursa Major (The Great Bear).  Abell 665 is the only galaxy cluster in Abell’s entire catalogue to be given a richness class of 5, indicating that the cluster contains at least 300 individual galaxies.

================== Source: esahubble.org/images/potw1744a/ ========================

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