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Hubble Views a Double Cluster of Glowing Galaxies


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Hubble Views a Double Cluster of Glowing Galaxies



This Hubble image features a massive cluster of brightly glowing galaxies, first identified as Abell 3192. Like all galaxy clusters, this one is suffused with hot gas that emits powerful X-rays, and it is enveloped in a halo of invisible dark matter. All this unseen material – not to mention the many galaxies visible in this image – comprises such a huge amount of mass that the galaxy cluster noticeably curves spacetime around it, making it into a gravitational lens. Smaller galaxies behind the cluster appear distorted into long, warped arcs around the cluster’s edges.

The galaxy cluster is in the constellation Eridanus, but the question of its distance from Earth is a more complicated one. Abell 3192 was originally documented in the 1989 update of the Abell catalog of galaxy clusters that was first published in 1958. At that time, Abell 3192 was thought to comprise a single cluster of galaxies, concentrated at a single distance. However, further research revealed something surprising: the cluster’s mass seemed to be densest at two distinct points rather than one.

Read More: ➡️ NASA


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