Perseus Cluster

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

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What Wikipedia says

The Perseus Cluster (also known as Abell 426) is a cluster of galaxies in the constellation Perseus. It has a recession speed of 5,366 km/s and a diameter of 863′. It is one of the most massive objects in the known universe, containing thousands of galaxies immersed in a vast cloud of multimillion-degree gas.

Excerpt from the Wikipedia article “Perseus Cluster”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: NASA/CXC/IoA/A.Fabian et al., Public domain, via Wikimedia Commons.