Quasars in Astronomy
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Questions and Answers

What factors influence the observed properties of a quasar?

  • The brightness of the host galaxy
  • The presence or absence of a jet (correct)
  • The color of the light emitted
  • The distance from Earth

    • When was the term 'quasar' first introduced?

  • In 1917 by Heber Curtis
  • In 1950 by Ernst Öpik
  • In 1970 by Radio Astronomy Association
  • In 1964 by Hong-Yee Chiu (correct)

    • How old was the universe when light from quasar ULAS J1342+0928 was emitted?

  • 690 million years old (correct)
  • 800 million years old
  • 2 billion years old
  • 1 billion years old

    • What is a large group of multiple quasars known as?

    <p>Large quasar group</p> Signup and view all the answers

    When did astronomers first realize that some objects seen were distant galaxies like the Milky Way?

    <p>Between 1917 and 1922</p> Signup and view all the answers

    What powers the emission from an active galactic nucleus (AGN) in a quasar?

    <p>Supermassive black hole</p> Signup and view all the answers

    How do quasars compare in luminosity to a galaxy like the Milky Way?

    <p>Thousands of times more luminous</p> Signup and view all the answers

    Why are quasars usually categorized as a subclass of the more general category of AGN?

    <p>As they have supermassive black holes at their centers</p> Signup and view all the answers

    What is the cosmological origin of the redshifts observed in quasars?

    <p>Expansion of the universe</p> Signup and view all the answers

    What did the term 'quasar' originate as a contraction of?

    <p>'Quasi-stellar [star-like] radio source'</p> Signup and view all the answers

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