Earth and planet

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Across
  1. 3. the side of Mercury facing away from the sun is extremely _______.
  2. 4. a constellation in the northern sky is called
  3. 8. the fixed paths where the planets revolve around the sun
  4. 10. the fourth inner planet
  5. 12. the giant gas
  6. 13. the biggest and nearest star to earth
  7. 14. we can not see them when it is daylight
  8. 15. the largest planet on the solar system
  9. 18. mars is red because of the presence of _____ on its surface
  10. 19. the science that study about the universe
  11. 21. it has no moon and the side where it faces the sun is extremely hot
  12. 22. billions of stars together
  13. 23. the third largest planet on Earth
Down
  1. 1. _______ in Neptune causes the planet
  2. 2. a group of stars that form recognizable pattern in the sky
  3. 5. closer planets to the sun
  4. 6. it has 2 moons and is bigger than Mercury
  5. 7. the farthest planet from the sun
  6. 9. natural satellite of Earth
  7. 11. this planet is very hot because of the carbon dioxide that traps the sunlight.
  8. 13. it has ring made of gases and dust around it
  9. 16. the smallest planet in our solar system
  10. 17. they revolve around the planets
  11. 20. a name of galaxy