Sun, Moon and Stars

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Across
  1. 3. Glowing balls of gas
  2. 7. A group of billions of stars
  3. 8. Closest planet to the sun
  4. 9. Something that makes things far away look closer
Down
  1. 1. A person who is specially trained to travel into space
  2. 2. A spacecraft was sent to this planet
  3. 4. The closest star to Earth
  4. 5. A hole on a planet by a rock hitting it
  5. 6. Only planet with life
  6. 8. A ball of rock that goes around the Earth