The Nebular Hypothesis

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Across
  1. 3. Rocky planets that formed near the heat of the young
  2. 5. The attractive force that caused the initial cloud to collapse.
  3. 7. A giant interstellar cloud of gas and dust from which the solar system formed.
  4. 9. The early, hot stage of a star forming at the center of a collapsing cloud.
  5. 11. Pierre-Simon Laplace, who published a more detailed version of the theory.
  6. 12. The physics principle that causes a collapsing cloud to spin more rapidly.
Down
  1. 1. The stage after a planetesimal, where the body is large enough to be spherical.
  2. 2. The flattened, rotating shape the nebula took as it spun faster.
  3. 4. This central body contains over 99% of the solar system's total mass.
  4. 6. The nuclear reaction that powers stars.
  5. 8. Gaseous planets that formed in the cooler outer disk.
  6. 10. The process where particles collide and stick together to form larger bodies.