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Explain how astronomers determined that quasars are at the distances implied by their redshifts. Justify the statement that the enormous amount of energy produced by

  • Explain how astronomers determined that quasars are at the distances implied by their redshifts.
  • Justify the statement that the enormous amount of energy produced by quasars is generated in a very small volume of space
  • Describe the characteristics common to all quasars

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