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Supermassive galaxies are found at the core of rich galaxy clusters.
Q12: From studies of the rotations of galaxies
Q24: Using binary galaxies to find their masses
Q43: The light- gathering power of a telescope
Q44: Galaxies look the same whether viewed in
Q78: Why are type O, A, and M
Q82: Because of their immense size, black holes
Q96: Why was Herschel's strategy for mapping our
Q102: According to the turn- off points of
Q105: What happened to the dinosaurs? How does
Q124: Irr II galaxies may be the result