The Planets Crossword

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Across
  1. 4. The planet we live on
  2. 6. A person who's job it is to go to space
  3. 8. Someone from outer space
  4. 10. What can we see at night?
Down
  1. 1. Mars' ground looks r____?
  2. 2. A type of alien people think live on Mars
  3. 3. What do we use to travel to the moon? A space ____?
  4. 5. What star makes Earth hot?
  5. 7. The organisation in America that runs space travel
  6. 9. Is Mars warm or cold?