SOCIAL: THE UNIVERSE

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Across
  1. 4. this planet is the following to the Earth
  2. 5. the spinning of the earth is called
  3. 8. the earth orbits the sun
  4. 10. was formed 5B years ago.
  5. 12. the moon is a .... of the Earth
  6. 15. our galaxy is called....
  7. 16. This occurs when we cannot see very much of the beach
  8. 17. were formed 13B years ago.
  9. 19. was formed 4.5B years ago.
  10. 20. objects ........... include planets, stars...
  11. 21. the time that the Earth does the rotation
Down
  1. 1. this is the part of the moon that we cannot see
  2. 2. this planet has a ring
  3. 3. in a black hole the ..... is stronger
  4. 6. this planet is the nearest to the Sun
  5. 7. and gas galaxies are formed of stars, planets and....
  6. 9. the shape of our galaxy
  7. 11. bang ..... occured 14B years ago.
  8. 12. were formed 13.8B years ago.
  9. 13. this planet is the furthest from the Sun
  10. 14. the time that the Earth does the revolution
  11. 18. .... is an imaginary line.