Astronomy

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Across
  1. 4. range of different colors with different wavelengths.
  2. 9. distance that light travels in one year.
  3. 10. motion of a planet on its axis.
  4. 11. sun is at the center.
  5. 12. Mars orbit.
  6. 13. meteoroid enters earths atmosphere, friction with air creates heat.
  7. 14. a chunk of rock or dust in space.
  8. 18. huge group of stars.
  9. 19. movement of an object around another object.
  10. 21. explosion of a dying supergiant star.
  11. 23. pattern of stars in the sky.
  12. 24. rocky objects too small and too numerous to be considered full-fledged.
Down
  1. 1. all objects are attracted to each other.
  2. 2. all of space and everything in it.
  3. 3. large cloud of gas & dust in space.
  4. 5. earliest stage of a star.
  5. 6. apparent change in position of an object when you look at it from different places.
  6. 7. formed the building blocks of the planets.
  7. 8. breaks light into colors.
  8. 13. meteoroids that pass through atmosphere and strike earths surface.
  9. 15. a building that contains one or more telescopes.
  10. 16. a natural satellite that revolves around a planet.
  11. 17. enormously bright distant galaxy with a giant black hole at its center.
  12. 20. Earth is at the center.
  13. 22. loose collections of ice, dust, & small rocky particles.