Abell cluster

| A-be-l cl-us-ter |

A galaxy cluster that belongs to the Abell catalogue.

Abel cluster

A galaxy cluster that belongs to the Abell catalogue. This is a listing of more than 4,000 galaxy clusters that meet certain criteria, one of which is having at least 30 galaxies within a set magnitude range. The catalogue is divided into five groups of richness according to how many galaxies the cluster contains. Class 0 clusters contain between 30 and 49 galaxies, and class 5 clusters contain more than 299 galaxies.

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