SOLAR SYSTEM

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Across
  1. 3. force that keeps planets in orbit
  2. 4. huge family of stars
  3. 7. largest planet in the solar system
  4. 8. third planet from the sun
  5. 10. Instrument used to see stars and planets
  6. 13. found at the centre of the solar system
  7. 14. rock fragments found in orbit between mars and Jupiter
  8. 16. known as the red planet
  9. 17. study of the heavenly bodies
  10. 18. it orbits the earth
Down
  1. 1. object that orbits a planet
  2. 2. planets rotate on their __________
  3. 5. the shape of the earth
  4. 6. closest planet to the sun
  5. 9. : a famous comet
  6. 11. planet with rings
  7. 12. : the planets __________ around the sun
  8. 15. : a mass of frozen gas and particles that travels the solar system