Space crossword

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Across
  1. 3. to turn on an axis
  2. 4. curved or rounded inwards
  3. 6. image, bounce and reflect
  4. 9. the heaviness of something
  5. 10. self-louminous piece of rock
  6. 13. a group of stars that have been given a name
  7. 14. how much stuff something contains
Down
  1. 1. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, or Neptune
  2. 2. bends light, image and magnify
  3. 3. change of path/direction of light
  4. 5. the path of a planet or moon
  5. 7. the force of attraction
  6. 8. to zoom or to enlarge
  7. 11. a large system of stars
  8. 12. reduce size/ make smaller
  9. 13. curved or rounded outward