Astronomy 2 Crossword Puzzle

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Across
  1. 5. the brightnesss of a star when viewed from Earth
  2. 9. arrangement of electromagnetic radiation- including radio waves
  3. 10. how fast light travels
  4. 11. large group of stars
Down
  1. 1. the change in the wavelength of light due to an object moving towards an observer
  2. 2. a contracting cloud of gas and dust; earliest stage of a stars life
  3. 3. the brightness that a star would have at a distance of 32.6 light years from Earth
  4. 4. a diagonal area on an H-R diagram that includes more than 90 percent of all stars
  5. 6. the number of complete wavelengths that pass a point in a given time
  6. 7. small stars located on the lower left on the H-R diagram
  7. 8. stars 1000 times brighter than our Sun, shortest living stars