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A cluster of elliptical galaxies, visible as a crowd of oval shapes, each glowing around a bright core. The elliptical galaxy that appears largest by far is in the center, with the other largest galaxies close to it. They are surrounded by a variety of more distant stars and galaxies, in many shapes and sizes but all much smaller, on a dark background.

A Cosmic Cluster

The massive cluster Abell 3322 is featured in this image from the NASA/ESA Hubble Space Telescope, in which the galaxy 2MASX J05101744-4519179 basks in the center. This distant galaxy cluster is a cosmic leviathan that is highly luminous at X-ray wavelengths. Observing galaxy clusters like Abell 3322 can advance our understanding of the evolution and interactions of dark and luminous matter in galaxy clusters, and also reveals powerful gravitational "telescopes" that magnify distant objects through gravitational lensing. Knowing the location of these lenses can enable future observations with both Hubble and the NASA/ESA/CSA James Webb Space Telescope. The galaxy cluster is located in the constellation Pictor, around 2.6 billion light-years from Earth.

Image Credit: ESA/Hubble & NASA, H. Ebeling
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