Astronomy Vocabulary

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Across
  1. 2. eclipse in which the moon passes through Earth's shadow
  2. 4. change in direction of axis, without change in tilt
  3. 6. point between two objects where they balance each other
  4. 7. the plane in which Earth orbits about the Sun
  5. 8. movement of the Earth around the Sun
  6. 9. commonly referred to as 'light'
  7. 15. breaking up large nuclei into two or more nuclei
Down
  1. 1. combining light nuclei to form larger nuclei; hyrdogen to helium
  2. 3. theory in which there was a sudden expansion of matter and time
  3. 4. converting solar energy into chemical energy
  4. 5. eclipse in which the moon passes directly between the Sun and Earth
  5. 10. time it takes from one full moon to the next
  6. 11. results in the apparent rising and setting of the Sun
  7. 12. 23.5 degree tilt
  8. 13. wobbling around precessional axis; 18 year period
  9. 14. pathway a planet takes around the Sun (or any larger celestial body)
  10. 16. these are a result of the 23.5 degree tilt of Earth's axis