The Solar System

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Across
  1. 4. When a planet spins on its axis.
  2. 8. The abbreviation of the National Aeronautics and Space Administration.
  3. 9. The name of our galaxy.
  4. 12. The oval path that the planets move in.
  5. 13. A natural satellite.
  6. 14. The number of planets in our solar system.
  7. 16. Often seen in the night sky as a shooting star.
  8. 17. A scientist who studies space.
  9. 18. Now known as a 'dwarf planet'.
  10. 19. A grouping of stars.
  11. 23. The largest planet in our solar system.
  12. 24. The closest planet to the sun.
  13. 27. The planet famous for its rings.
  14. 28. The planet known as the Red Planet.
Down
  1. 1. The force that holds everything in place.
  2. 2. The first astronomer to explain solar and lunar eclipses.
  3. 3. There are billions of these visible in the night sky.
  4. 5. Provides all things with life.
  5. 6. Is made up of the sun, planets, comets, asteroids and meteors.
  6. 7. The Italian astronomer who confirmed that the sun is the centre of the solar system.
  7. 10. The organisation that operates the Australia Telescope National Facility.
  8. 11. The astronomer to suggest that the sun is the centre of the solar system.
  9. 15. The planet known as the Morning Star.
  10. 18. Earth is considered to be one.
  11. 20. Large rocks that orbit the sun.
  12. 21. The only planet that water is in liquid form.
  13. 22. One of the planets composed only of gas.
  14. 25. Frozen dust and gas which orbits the sun, often seen with a tail.
  15. 26. The smallest of the gas giants.