Space Crossword

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Across
  1. 4. A cloud of gas and dust
  2. 5. An optical instrument designed to make distant objects appear nearer
  3. 8. Earth's only natural satellite
  4. 9. What Jupiter, Saturn, Neptune and Uranus are made of
  5. 10. A person who goes into space
  6. 13. The only known planet to have life
  7. 15. The gaseous area surrounding a planet or other body
  8. 18. The curved path of a celestial object or spacecraft around a star, planet or moon
  9. 19. Large rocks in outer space
  10. 20. The tilt the Earth has that created the seasons
  11. 21. The brightest star in our Solar system
Down
  1. 1. A group of stars, gas and dust held together by gravity
  2. 2. An exploding star
  3. 3. The most famous dwarf planet
  4. 4. The main gas in our solar system
  5. 6. A large, bowl-shaped cavity in the ground or on the surface of a planet
  6. 7. An object consisting of a nucleus of ice and dust with a tail
  7. 9. The force that pulls all bodies of matter together
  8. 11. The collection of eight planets and their moons in orbit around the sun
  9. 12. Smaller rocks in space
  10. 14. A scientist who specialises in the universe
  11. 16. The galaxy our solar system is in
  12. 17. The event in which Earth or the moon passes through a shadow of another body