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Across
  1. 4. the red planet
  2. 5. which planet spins very fast
  3. 6. the _ is at 5600 degrees
  4. 8. what is the smallest planet in the solar system
  5. 11. which age have the universe
  6. 12. what is the coldest planet in the solar system
Down
  1. 1. which spacerocks are similar to asteroids
  2. 2. how many humans have walk on the moon
  3. 3. what is the largest planet in the solar system
  4. 5. goggles what do you need to watch the sun directly
  5. 7. what is the furthest planet away from the sun
  6. 9. this star is luminous
  7. 10. you live on that planet