Astronomy

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Across
  1. 6. early solar system made up of dust,gas,and ice
  2. 7. process that helps create planetesimals
  3. 9. other element created in the big bang
  4. 12. rotating disk of dust and gas put together by gravity
  5. 13. one of the two first elements created in the big bang
  6. 15. Celestial bodies that created other elements beside hydrogen and helium
Down
  1. 1. Event that created the universe
  2. 2. coldest planet in the solar system
  3. 3. law that states galaxies are moving away from each other
  4. 4. only planet in the solar system with known life
  5. 5. force that creates solar nebula's
  6. 8. largest planet in the solar system
  7. 10. only other body beside earth with active volcanoes
  8. 11. closest planet to the sun
  9. 14. Solar nebula starts as dust,___,and ice.