Sun & Stars

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Across
  1. 4. The number of stars in the universe.
  2. 6. What hydrogen is converted to during fusion.
  3. 7. To be considered a star, the celestial body must be able to produce heat and ________
  4. 9. The part of the sun that fusion occurs.
  5. 10. The name of our solar system
  6. 12. What a light year measures
  7. 14. The furthest of the inner planets.
  8. 17. Fusion forms a ____________ atom.
  9. 18. The closest of the outer planets.
  10. 19. Our sun is considered this sized star.
  11. 20. What is released from a fusion reaction
Down
  1. 1. The force that holds the solar system together
  2. 2. The largest object in our solar system
  3. 3. The type of star our sun is
  4. 5. About 6 trillion miles.
  5. 7. The sun is __________ dense than earth.
  6. 8. Stars are the building blocks of __________
  7. 10. The closest planet to the sun
  8. 11. The combination of two elements
  9. 13. The number of planets in our solar system
  10. 15. Huge celestial bodies made mostly of hydrogen and helium
  11. 16. The furthest planet from the sun.