Space Crossword

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Across
  1. 2. What type of people go up into space?
  2. 4. What is the "Milky Way?"
  3. 5. Furthest planet from the Sun.
  4. 8. A person who travels into the "unknown".
  5. 10. What's the closest planet to the Sun?
Down
  1. 1. What is the study of the stars called?
  2. 3. What do you need to see the Solar System up-close?
  3. 6. What's the biggest planet in our Solar System?
  4. 7. A vehicle used to launch satellites.
  5. 9. What planet do we live on?