SOLAR SYSTEM

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