Horologium Supercluster
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The Horologium supercluster (also known as Horologium-Reticulum supercluster) is a massive supercluster about 905 million light-years away in the constellations Horologium and Eridanus. It is about 550 million light-years across and has a mass of 1017 solar masses. The Horologium supercluster has about 5,000 galaxy groups (30,000 giant galaxies and 300,000 dwarf galaxies).
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