Astronomy Review

1234567891011121314151617181920
Across
  1. 2. What causes the seasons
  2. 5. We can determine the universe is expanding by galaxies doing what
  3. 7. Galaxies move in what speed in red wavelength
  4. 11. What theory states the Sun is in the center of the solar system
  5. 12. This law states that galaxies speed is proportional to their distance
  6. 15. It takes 29.5 days for this to be completed
  7. 16. What theory states the Earth is in the center of solar system
  8. 17. What happened 13.7 billion years ago "creating" the universe
  9. 19. Galaxies move in what speed in a blue wavelength
  10. 20. Moon appears to be getting bigger
Down
  1. 1. How we conclude if an object is moving towards or away from a source by its wavelength
  2. 3. The sun is one big ___
  3. 4. Earth move at this speed when it is close to the sun
  4. 6. The imaginary path that the planets orbit around the sun
  5. 8. When earth complete a full orbit around the sun
  6. 9. How the moon gets its light
  7. 10. Earth move at this speed when it is further away from the sun
  8. 13. If it is summer in the northern hemisphere what season is the southern hemisphere in
  9. 14. Moon appears to be getting smaller
  10. 15. What galaxy do we live in
  11. 18. How many moon phases do we have