Waves and Space......What?!?

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Across
  1. 1. a giant ball of hot gas, mainly hydrogen
  2. 2. the rays with the shortest frequency
  3. 6. a bridge "Galloping _______________"
  4. 9. an object that burns up in our atmosphere is called a _________
  5. 10. the planet featured in the movie The Martian
  6. 11. the maximum distance the wave rises above the resting point
  7. 15. what a wave travel through
  8. 16. the distance of one complete wave
  9. 18. the type of wave that has a crest and trough
  10. 19. the longest electromagnetic waves
  11. 20. a packet of light energy
  12. 21. a pattern of stars that people imagine as a person, object, or animal
  13. 23. the hottest planet (Hint: its not Mercury)
  14. 26. orbits the sun, rounded by its gravity, cleared its orbit
  15. 29. the number of waves that pass in a given amount of time
  16. 31. the last planet in our solar system (Pluto is not a planet)
  17. 32. the low point of a wave
  18. 33. the type of rays after ultra-violet
Down
  1. 1. something that orbits a planet
  2. 3. a mixture of dust and ice orbiting in space
  3. 4. the waves found between radio and infrared
  4. 5. the waves just before we can see the color red
  5. 7. an area in a longitudinal wave that has been smashed together
  6. 8. the largest planet
  7. 12. the type of waves that require a medium to travel through
  8. 13. a repeating back and forth motion
  9. 14. the biggest object in the night sky
  10. 17. the effect of when light knocks electrons off metal
  11. 22. the high point of a wave
  12. 24. the only planet with discovered life on it
  13. 25. the first planet
  14. 27. what frequency is measured in
  15. 28. the ability to do work
  16. 30. the planet known for its many rings