P7 Quiz: Mapping the universe

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  • Created by: Boma
  • Created on: 23-06-13 22:17

1. Who was right in the Curtis-Shapley debate?

  • Neither
  • Both: Shapley was right about the Sun being away from the centre of our galaxy, but Curtis was right about the multiple galaxies and that the nebulae were far away from the Milky Way
  • Curtis: He thought there were many galaxies, 10,000 pc across each, with the Sun at the centre and that nebulae were separate from the Milky Way
  • Shapley: He believed there was one galaxy, 100,000 pc across, with the Sun away from the centre, and that nebulae were part of the Milky Way
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Other questions in this quiz

2. Cepheid variable stars are stars that...

  • ...do not have a constant luminosity
  • ...do have a constant luminosity

3. Parallax is...

  • ...position or direction of an object appears to differ when viewed from different positions
  • ...position or direction of an object appears to not change when viewed from different positions

4. What is red-shifting?

  • The change in wavelength of light from a distant star moving away from Earth.
  • The change in wavelength of light from a distant star moving towards Earth.
  • The change in wavelength of light from a close star moving away from Earth.

5. The parallax angle of a star is...

  • half the angle that a star moves in three months, against a background of very distant stars
  • ...half the angle that a star moves in six months, against a background of very distant stars
  • ...quarter the angle that a star moves in six months, against a background of very distant stars
  • half the angle that a star moves in nine months, against a background of very distant stars

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zo26blue

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100%, excellent resource, thank you.

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