Space Crossword

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Across
  1. 3. What might we use to travel large distances in Space?
  2. 4. What is the fifth closest planet to the Sun?
  3. 5. What is another name for a comet?
  4. 7. What phrase refers to everything between the Sun and Neptune?
  5. 10. Who was the first man on the Moon? Neil ______
  6. 12. After what event did the Universe start?
  7. 13. What is the name of a creature from another planet?
Down
  1. 1. Who invented the Theory of Relativity?
  2. 2. What is the name of the explosion of a very big star?
  3. 6. What device would we use to go to the past?
  4. 8. What unit of distance do we use in Space?
  5. 9. What is the name for a metal servant?
  6. 11. What force holds the Earth in orbit around the Sun?