Kshitij  Gupta

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The Coma cluster, as we call it, is an isolated and richly populated ensemble of galaxies about 300 million light-years from Earth. Its thousand galaxies orbit the cluster’s center, moving in all directions like bees swarming a beehive.
Astrophysics for People in a Hurry (Astrophysics for People in a Hurry Series)
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