Astronomy

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Across
  1. 2. Equal length of day and night.
  2. 7. Brightest objects in the Universe.
  3. 8. Death of a massive star.
  4. 9. Discovered laws of planetary motion
  5. 12. Space telescope, launched in 1990.
  6. 14. What the Sun will be when Earth is destroyed.
  7. 16. Birth place of stars.
  8. 17. Collection of stars kept together via gravity.
Down
  1. 1. North star.
  2. 3. Discovered moons around Jupiter.
  3. 4. Band of EM radiation we see the heat of the Big Bang in.
  4. 5. Distance related to a parallax of 1 arcsecond.
  5. 6. Theory pushed by Fred Hoyle.
  6. 10. Not a planet.
  7. 11. The hunter, a constellation.
  8. 13. Current theory for the formation of everything.
  9. 15. Manned missions to the Moon.