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5 Written Questions

5 Matching Questions

  1. Parallax Shift
  2. Proxima Centauri
  3. Barnard's Star
  4. Spectral type A
  5. Absolute Magnitude
  1. a Brightness if we moved all the stars to the same distance. 10 pc. (Comparing apples to apples)
  2. b 1/2 the star's shift back and forth, in degrees.
  3. c Next closest star after the Sun. Part of the three-star Alpha Centauri system. 4.3 light years away. (50 mile high stack of toilet paper stretched out 1 sheet = 1 million miles scale. Parallax angle of 0.77 arcsecond. From the Sun, 1.3 pc or 4.3 ly away or 3.98 x 10^13 km (2.43 x 10^13 miles). Largest Parallax angle we see.
  4. d Next closest after Proxima Centauri. 6 light years away. Next there are about 30 stars within 16.5 light years of earth.
  5. e Aqua - Temperature range: 7,500 - 10,000 K

5 Multiple Choice Questions

  1. The Sun
  2. Pair of stars that we can see orbiting each other.
  3. What we see in the sky. Star Charts and planispheres use different size "dots" to represent.
  4. A Star's total amount of power radiated into space; measured in watts
  5. Two stars that are so close that the only way we can detect the binary nature is through a spectral (red) shift.

5 True/False Questions

  1. Binary StarsStars that appear to change in brightness.


  2. SunSpectral type A (aqua) Temperature range: 7,500 - 10,000 K


  3. Spectral type BPale Blue -Temperature range: 10,000 - 30,000 K


  4. SupergiantsCool stars which are very large and very bright.


  5. SiriusSpectral type A (aqua) Temperature range: 7,500 - 10,000 K


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