The Universe Crossword by Cassius Balon.

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Across
  1. 3. How many degrees is the Earth tilting (include the word 'degrees')?
  2. 7. What imaginary line is 23.5 degrees above the equator?
  3. 10. What is our the nearest galaxy?
  4. 12. What do you call a giant cloud of dust in space?
  5. 13. What celestial body has recently lost its title of a planet?
  6. 14. What infulences the Earths tides?
  7. 15. What is the name of a space telescope that has recently launched into space?
  8. 18. Who discovered Io?
  9. 20. How did the universe (supposedly) start?
  10. 21. What is the densest type of star?
Down
  1. 1. How many miles is the Earth away from the edge of the sun?
  2. 2. What type of galaxy is the Milky Way?
  3. 4. What is the name of the day when the day and night are of equal length?
  4. 5. What when colliding with Earth's magnetic field creates auroras?
  5. 6. What is the name of the star closet to the sun?
  6. 8. What manmade object has travelled furthest from Earth?
  7. 9. Which of Jupiter's moon is the most volcanic?
  8. 11. What is the biggest type of star?
  9. 16. Which planet in our solar system has a day longer than its year?
  10. 17. What is at the centre of the Milky Way?
  11. 19. How many planets are there in the Solar System?