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5 Written questions

5 Matching questions

  1. Hertzsprung-Russell Diagram
  2. Spectroscopic Binary
  3. Closest Star
  4. Variable Stars
  5. Rigel
  1. a Referred to as the H-R Diagram. Plots two stellar properties. The star's temperature (spectral class) and the star's Luminosity - measured either by solar units (against our Sun) or Absolute Magnitude.
  2. b Stars that appear to change in brightness.
  3. c Two stars that are so close that the only way we can detect the binary nature is through a spectral (red) shift.
  4. d Spectral type B (pale blue) Temperature range: 10,000 - 30,000 K
  5. e The Sun

5 Multiple choice questions

  1. 1/2 the star's shift back and forth, in degrees.
  2. White star - Temperature range >30,000 k.
  3. Stars not physically related to each other but happen to line up so that we see what appears to be a double star system. More rare than one would think.
  4. Aqua - Temperature range: 7,500 - 10,000 K
  5. Comparing a star's luminosity to our Sun's luminosity. Lsun = 3.8 x 10 ^26 watts.

5 True/False questions

  1. Four stellar groupsThe most important stellar property. Measured by an adaptation of Kepler's 3rd Law as derived by Sir Isaac Newton. Kepler's 3rd law you measure the period and average distance of the object's orbit. You need two objects. Over 50% of stars have a companion star.

          

  2. Stellar MassThe most important stellar property. Measured by an adaptation of Kepler's 3rd Law as derived by Sir Isaac Newton. Kepler's 3rd law you measure the period and average distance of the object's orbit. You need two objects. Over 50% of stars have a companion star.

          

  3. White DwarfsVery, very hot stars which are small in size.

          

  4. PolarisSpectral type F (pale yellow) Temperature range: 6,000-7,500 K.

          

  5. Visual BinaryPair of stars that orbit in the plane of our line of sight causing it to "blink". Often listed as EBS. (Algol in the Iliad by Homer)

          

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