Astronomy Crossword

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Across
  1. 3. A system of stars, stellar, etc
  2. 7. A dusty, cold, desert world with a very thin atmosphere
  3. 11. When the sun is assumed to be near the centric point
  4. 12. An area full of icy body
  5. 16. The universe
  6. 17. An area which have a group of visible stars form some pattern
  7. 18. First planet from the sun
  8. 19. A small rocky body that moves around the sun mainly between Mars and Jupiter.
  9. 20. The curved trajectory of an object
Down
  1. 1. The seventh planet from the sun
  2. 2. A rocky, terrestrial planet
  3. 4. A place in space where the pull of gravity is so strong that even light can't get out.
  4. 5. A small rocky in outer space
  5. 6. Covered in swirling cloud stripes
  6. 8. Someone who travels in space
  7. 9. An small Solar System that releases gases
  8. 10. A cloud of dust and gas in the space
  9. 13. When the earth is assumed to be near the centric point
  10. 14. A hot glowing ball of hydrogen and helium
  11. 15. An astronomical object held by self-gravity