How the Sun Got Hot Again

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Across
  1. 4. A heat-based force inside the sun
  2. 6. Sofie's plan/idea she thinks is correct
  3. 8. big and impressive the Sun looked up close
  4. 10. Stay alive on Earth as it gets colder
  5. 11. The bomb sent to the Sun
  6. 12. in history
  7. 13. The moment they saved the Sun - a big
Down
  1. 1. The Sun's energy that makes it burn
  2. 2. Make the Sun's power grow again
  3. 3. What the shields protect against
  4. 5. Karl is guessing/expecting what will happen
  5. 7. The shockwave shook the spaceship violently
  6. 9. Sofie's answer for why the Sun got cold