Out of the World

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Across
  1. 1. who is the first dog in sace
  2. 3. A planet that has the highest mountains
  3. 6. how do they study in space
  4. 7. the first astronaut sent to space
  5. 11. unidentified flying object
  6. 12. what is the same size as Earth
  7. 13. What happens after a star dies.
  8. 16. what galaxy are we on
Down
  1. 2. the first monkey sent to space
  2. 4. Famous for its rings
  3. 5. how found Jupiter and its Moon
  4. 8. how did they reach the Moon
  5. 9. Orbits the Earth
  6. 10. that we can start fire
  7. 14. the coldest planet
  8. 15. one of Jupiter's Moon has water