Puzzle

1234567891011
Across
  1. 4. a pattern formed by a group of stars
  2. 7. an icy celestial body with a glowing tail
  3. 8. the hottest planet in our solar system
  4. 11. the largest planet in our solar system
Down
  1. 1. the galaxy we live in
  2. 2. a small rocky body orbiting the sun
  3. 3. the Red Planet
  4. 5. the path followed by a planet around the sun
  5. 6. the natural satellite of Earth
  6. 9. our home planet
  7. 10. the closest star to Earth