The solar system

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Across
  1. 2. The area of gases and dust that form around a comet as it passes by the Sun.
  2. 5. A very small star that does not shine brightly.
  3. 6. The second closest planet to the Sun.
  4. 10. An instrument used to view objects in outer space.
  5. 11. The American spelling of plough.
  6. 14. A very large cloud of dust and gas that exists in outer space.
  7. 15. A bright object in space that has a tail of gas and dust.
  8. 17. Wind A stream of charged particles that is constantly flowing from the Sun.
Down
  1. 1. Any other planet.
  2. 3. A dark area on the Sun caused by cooling from electromagnetic activity within the Sun.
  3. 4. The path a celestial object takes around a star or planet.
  4. 7. A natural or artificial object that is in orbit around a planet.
  5. 8. A spiral galaxy where our Solar System and Earth are located.
  6. 9. A person who is specially trained to travel into outer space.
  7. 12. The furthest planet from the Sun until it was demoted from a planet to a dwarf planet in 2006.
  8. 13. The large group of stars and planets that the Earth and our sun are part of.
  9. 16. The fifth largest planet in the Solar System and third from the Sun.
  10. 17. Any very bright star, especially one that a planet travels round.