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5 Written questions

5 Matching questions

  1. Solar Luminosity
  2. Open Cluster
  3. Polaris
  4. Spectral Type
  5. OBAFGKMRNS
  1. a Comparing a star's luminosity to our Sun's luminosity. Lsun = 3.8 x 10 ^26 watts.
  2. b Oh Be A Fine Guy Kiss Me Right Now Sweetheart.
  3. c Spectral type F (pale yellow) Temperature range: 6,000-7,500 K.
  4. d Stars color/surface temperature E - this is how we classify stars.
  5. e Group of young, hot stars that are physically related by being held together by gravity. <50 -100> stars.

5 Multiple choice questions

  1. One of the major classes of variables.
  2. Gravitationally-bound grouping of very old stars. <10,000 to one million stars> Old, many, many, stars, organized.
  3. Pair 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)
  4. Next closest after Proxima Centauri. 6 light years away. Next there are about 30 stars within 16.5 light years of earth.
  5. Consist of two major groups: Open and Globular

5 True/False questions

  1. Cepheid VariablesOne of the two major classes of variables. There are five classes. One important example: Cepheid Variables.

          

  2. Spectral type FOrange - Temperature range: 3,500 - 5,000 K.

          

  3. Main SequenceThe distance to an object with a parallax angle of 1 arcsecond; unit is pc. One pc = 3.26 light years (ly) = 3.09 x 10^13 km.

          

  4. Absolute MagnitudeBrightness if we moved all the stars to the same distance. 10 pc. (Comparing apples to apples)

          

  5. SiriusSpectral type G (yellow) Temperature range: 5,000 - 6,000 K.