The 10 Million Billion Supercluster

This huge group of galaxies is the most massive structure within a billion light-years from us.

ESA's Planck mission recently took a look at the Shapley Supercluster in microwave light. The massive grouping has more than 8000 galaxies and a total mass of more than ten million billion times the mass of our sun. Image: ESA & Planck Collaboration / Rosat/ Digitised Sky Survey (ESA & Planck Collaboration / Rosat/ Digitised Sky Survey)

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