Space and telescopes

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Across
  1. 2. When light rays get closer together
  2. 5. Force that keeps planet in orbits
  3. 8. The second‑largest planet, famous for its rings
  4. 11. Used to be planet but now just a dwarf planet
  5. 12. light is this type of wave
  6. 13. the largest planet in the Solar System
  7. 15. The star at the centre of our Solar System
  8. 16. Our home planet
  9. 17. When light rays spread out
Down
  1. 1. Light refracts when passing through substance of different...
  2. 3. As a sound towards, the frequency gets....
  3. 4. Large bodies of ice and dust following long elliptical orbits
  4. 6. Small rocky worlds that orbit between Mars and Jupiter
  5. 7. The region of icy bodies beyond Neptune
  6. 9. The planet known as the “Red Planet”
  7. 10. Natural objects that orbit planets
  8. 14. no light can escape these
  9. 18. The hottest planet