The Universe

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Across
  1. 3. The sun sets in the... (4).
  2. 5. All of space and everything in it (8).
  3. 7. A point of light in the night sky (4).
  4. 9. The force that makes things fall to the ground (7).
  5. 10. A point in space that even gravity cannot escape from (10).
  6. 13. That area beyond the Earth´s atmosphere (10).
  7. 14. When the Moon passes into the Earth´s shadow (12).
  8. 17. The planet Venus when seen in the morning (11).
  9. 19. The sun sets in the... (4)
  10. 22. Those machines that travel around the world (10).
  11. 25. The universe considered as an ordered system (6).
  12. 26. Objects in space with bright long tails (6).
  13. 28. An Unidentified Flying Object (3).
Down
  1. 1. Little green men from another planet (6).
  2. 2. THe large round things that orbit the Sun (7).
  3. 4. The broad band of stars in the night sky (8).
  4. 6. Santa Clause lives at the ______ pole (5).
  5. 8. The mass of air surrounding the Earth (10).
  6. 11. The round silver thing in the night sky (4).
  7. 12. A rock that falls to the Earth from outer space (9).
  8. 15. When the Earth passes into the Moon´s shadow (12).
  9. 16. The curved path the Moon takes around the Earth (5).
  10. 18. Our sun and the planets that move around it (11)
  11. 20. How far light travels in one year (9).
  12. 21. Very large groups of stars that make up the universe (6).
  13. 22. That round yellow thing in the sun at daytime (3).
  14. 23. What you look through to see far-away things (9).
  15. 24. A round ball with a map of the Earth on it (5).
  16. 27. Penguins live at the ______ pole (5).