Astronomy One

123456789101112131415161718192021222324252627282930
Across
  1. 2. hottest part of the Sun
  2. 6. smallest planet
  3. 8. like a gas but composed of ions
  4. 10. spring ___ marks the end of winter
  5. 14. "backward" motion of planets as seen from Earth
  6. 16. hottest planet
  7. 18. the longest or shortest day of the year
  8. 19. "fourth rock from the Sun"
  9. 23. best known dwarf planet
  10. 25. having the Sun at the centre
  11. 26. force that holds the Sun together
  12. 27. largest planet
  13. 28. the North Star
  14. 30. element discovered on the Sun
Down
  1. 1. type of telescope used to see a black hole
  2. 3. planet with the largest orbit
  3. 4. an event where the Sun, Earth and Moon line up
  4. 5. huge ball of hot plasma
  5. 6. "shooting stars"
  6. 7. the Earth ___ around the Sun
  7. 9. rotates on its axis every 27 days
  8. 11. having the earth at the centre
  9. 12. farthest planet visible with the naked eye
  10. 13. the Sun is mostly made of ___
  11. 15. shape of planetary orbits
  12. 17. astronomical ___ is the Earth-Sun distance
  13. 20. the Earth ___ on its axis
  14. 21. nuclear ___ powers the Sun
  15. 22. our star
  16. 24. path the Sun traces out through the stars
  17. 29. the phase of the moon during a solar eclipse