Science 9 - Space Exploration: Then Universe

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Across
  1. 6. light coming from distant stars
  2. 7. theory that the universe oscillates between Big Bang and Big Crunch
  3. 8. darkest thing in the universe
  4. 9. phase in which a star no longer emits light
  5. 11. star expands and cools and glows red
  6. 13. stage in which star shines for billions of years
  7. 14. all of space and time and their contents
  8. 16. distance light travels in one year
  9. 18. powerful explosion that may produce a neutron star
  10. 20. means milky
  11. 21. shines with white hot light
  12. 23. earliest stage of a star's life
Down
  1. 1. space telescope was named after this American astronomer
  2. 2. 88 are recognized by the IUA
  3. 3. the Milky Way is this type of galaxy
  4. 4. theory that the universe will one day stop expanding
  5. 5. neutron star that emits radio waves in pulses
  6. 7. most widely accepted theory of the origin of the universe
  7. 10. the science of the origin and development of the universe
  8. 12. type of galaxy that has no particular shape
  9. 15. part of a spiral galaxy
  10. 17. type of galaxy that is oval shaped
  11. 19. giant cloud of gas and dust
  12. 20. is a system of billions of stars together with gas and dust
  13. 22. brightest thing in the universe