Studying Space Vocab

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Across
  1. 5. system for measuring long intervals of time
  2. 9. light that humans can see
  3. 11. uses a curved mirror to gather & focus light
  4. 13. study of the universe
  5. 14. "beyond the violet" shorter wave than violet on spectrum
  6. 15. uses a set of lenses to gather & focus light
  7. 18. point closest to the sun
Down
  1. 1. group of stars organized into a recognizable pattern
  2. 2. movement of the earth around the sun
  3. 3. point where the sun is as far north or south as possible
  4. 4. spectrum showing frequencies/wavelengths of radiation
  5. 6. point farthest from the sun
  6. 7. instrument that collects electromagnetic radiation for better observation
  7. 8. spin of the earth on its axis
  8. 10. "below the red" longer wave than red light on spectrum
  9. 12. large collection of dust, stars and gas.
  10. 13. average distance between Earth and sun (abbreviation)
  11. 16. shortest wave length
  12. 17. equal hours of daylight and darkness