Astrononomy Puzzler

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Across
  1. 2. one cycle of moon phases
  2. 5. how many official planets are in the solar system
  3. 6. third planet from the sun
  4. 8. the universe is getting ________
  5. 10. astronauts on the ISS _________ because there is no gravity in space
  6. 13. planet that orbits on its side
  7. 15. planet with a large core compared to outer crust
  8. 18. planet most similar to earth in size
  9. 20. a group of stars forming a recognizable pattern
  10. 22. sailed the earth and proved it was round
  11. 23. one earth cycle around the sun
  12. 24. planet with the fastest winds in the solar system
  13. 25. an eclipse in which the sun is obscured by the moon
Down
  1. 1. only place in our solar system humans have set foot on
  2. 3. planets made of gasses rather than rocks
  3. 4. the alternate rising and falling of the sea due to gravity of moon
  4. 7. a celestial body resembling a small planet but lacking certain technical criteria
  5. 9. JWST (for short)
  6. 11. one cycle of a planet
  7. 12. largest planet in the solar system
  8. 14. our galaxy name
  9. 16. the name of the north star
  10. 17. a planet with iron rocky surface
  11. 19. our sun is a ________
  12. 21. a dwarf planet after neptune