Solar System

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Across
  1. 2. the closest planet to the sun; smallest planet
  2. 5. the third planet from the sun; the only planet people have walked on
  3. 6. planet with the brightest rings; also less dense than any other planet
  4. 9. place where astronauts live and work in space
  5. 13. the closest star to Earth
  6. 16. the red planet; humans have sent robots there.
  7. 17. instrument used for seeing the planets and stars clearly
  8. 19. hottest planet; deadly gases cover the planet's surface
  9. 20. an American space traveler.
  10. 21. number of stars in our solar system
Down
  1. 1. Large planet known for the giant storm called the Great Red Spot
  2. 3. Saturn, Jupiter, Uranus, and Neptune all have _______ around them
  3. 4. it takes Earth 365 days to ______ the sun
  4. 7. planet that rotates on its side
  5. 8. to turn on an axis
  6. 10. dwarf planet with two moons; used to be qualified as a planet
  7. 11. our sun and the objects that orbit around it
  8. 12. Neil Armstrong was the first human to walk on this
  9. 14. the furthest planet form the sun
  10. 15. The force that pulls you towards the center of the planet
  11. 18. number of planets in our solar system