Across
- 3. the fifth largest planet in the Solar System and third from the Sun.
- 4. everything that exists including the stars, planets, matter, energy and time.
- 8. envelope of gases that surround a planet.
- 11. area of gases and dust that form around a comet as it passes by the Sun.
- 12. relatively small solar system body that orbits the sun.
- 14. the largest planet in our solar system.
- 15. star and the biggest object in the Solar System.
- 16. any other planet.
Down
- 1. the second closest planet to the Sun.
- 2. the path a celestial object takes around a star or planet.
- 5. natural or artificial object that is in orbit around a planet.
- 6. system consisting of a large number of stars bound together by gravity.
- 7. the closest planet to the Sun in the Solar System.
- 9. natural satellite which orbits the Earth.
- 10. large cloud of dust in space. The dust in nebulae often forms stars and planets.
- 13. dark area on the Sun caused by cooling from electromagnetic activity within the Sun.