Stars: Mod. 23 Lesson 2 & 3

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Across
  1. 1. energy output from the surface of a start
  2. 5. a star cluster that is densely packed
  3. 6. color of star that can't sustain the fusion of hydrogen
  4. 8. distance light travels in one year
  5. 11. constellation that appear to rotate around the North Star
  6. 14. a group of stars that form a shape
  7. 18. large cool luminous star
  8. 20. the joining of atoms to form a new element
  9. 21. a cloud of gas and dust
  10. 23. cluster stars gravitationally bound to each other
  11. 24. unit equal to 3.26 light years
  12. 25. gas shoots off of a neutron star's surface
  13. 29. type of doppler shift that shows longer wavelengths of light
  14. 30. the gas that makes up most stars
Down
  1. 2. a star that blows itself apart
  2. 3. place where gravity is so strong light cannot escape
  3. 4. disk shape with a hot condensed center
  4. 7. apparent shift in position due to motion of person
  5. 9. magnitude that shows how bright a star appears
  6. 10. a dead star
  7. 12. determines the life cycle of a star
  8. 13. diagram used to plot the properties of a star
  9. 15. magnitude of a star if they were all at the same distance
  10. 16. neutron star the spins and emits light
  11. 17. 2 stars orbit a common center of mass
  12. 19. sequence area on HR diagram where most stars are found
  13. 22. controls the nuclear reaction rate
  14. 26. type of doppler shift that shows shorter wavelengths of light
  15. 27. type of star cluster that is not densely packed
  16. 28. small hot dense star