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5 Written questions

5 Matching questions

  1. Sirius
  2. Star Clusters
  3. Cepheid Variables
  4. Visual Binary
  5. Parallax
  1. a Pair of stars that we can see orbiting each other.
  2. b The apparent shift of an object relative to some distant background as the observer's point of view changes. Allows you to determine close stellar distances. Only works with fairly close stars
  3. c Spectral type A (aqua) Temperature range: 7,500 - 10,000 K
  4. d One example of a pulsating variable. Massive, high luminosity stars with short periods of one to 70 days and light variations of 0.1 to 2 magnitudes. Astronomers use these as a "standard" for distances.
  5. e Consist of two major groups: Open and Globular

5 Multiple choice questions

  1. Group of young, hot stars that are physically related by being held together by gravity. <50 -100> stars.
  2. Pale Yellow - Temperature range: 6,000-7,500
  3. The 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.
  4. 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.
  5. Systems in which physically associated star systems are made up of two stars.

5 True/False questions

  1. Spectral type GYellow - Temperature range: 5,000 - 6,000 K.


  2. Closest StarThe distance light travels in one year = approximately 10 trillion kilometers.


  3. Barnard's StarSystems in which physically associated star systems are made up of two stars.


  4. LuminosityA Star's total amount of power radiated into space; measured in watts


  5. Stellar EvolutionA star's life path as shown on a Hertzsprung-Russell Diagram.


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