Space cross word

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Across
  1. 2. What do you call an exploding star?
  2. 4. How long does a star live
  3. 7. How would our universe end
  4. 9. What is the smallest star called
  5. 10. How long does it take a star to turn into a black hole?
  6. 13. What is the closest planet to the sun
  7. 14. How fast does sound travel in space
  8. 15. How long does a black hole last
Down
  1. 1. Who was the Physicist who discovered gravity
  2. 3. Who was the first person on the moon
  3. 5. Which planet is a gas giant
  4. 6. What is the universe made of
  5. 8. When was the first space shuttle built
  6. 11. What is the biggest star called
  7. 12. When was the first space shuttle launched