Astronomy Review Crossword Puzzle

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Across
  1. 4. Hubble proved that the universe is doing this
  2. 5. contains all forms of matter, space & time
  3. 7. caused by the tilt of the Earth's axis
  4. 10. oval shape of orbits
  5. 11. wobbling of objects in space as they rotate
  6. 13. movement of Earth around the Sun (365 days)
Down
  1. 1. season where Earth is closest to the sun
  2. 2. type of radiation used for energy
  3. 3. scientist that has 3 laws of planetary motion
  4. 4. equal hours of day and night
  5. 6. movement of Earth that causes day & night
  6. 8. type of eclipse where moon is bet. the Earth & Sun
  7. 9. hydrogen & helium atoms splitting on the Sun
  8. 12. hydrogen and helium combining to produce energy