Chapter 1.3: Birth of the Solar System

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Across
  1. 5. Our own Sun's stream of escaping particles (2 words)
  2. 7. Growing body a few hundred km wide; eight became today's planets
  3. 8. Fusion inside aging suns that builds elements up to iron (2 words)
  4. 9. Leftover disk around the young Sun that built the planets (2 words)
Down
  1. 1. Sinking of dense iron to the center that gave the Earth layers
  2. 2. Model: ice and dust let small protostars collapse enough to ignite (2 words)
  3. 3. Making of elements heavier than iron in a dying star's blast (2 words)
  4. 4. Stream of atoms escaping from any sun (2 words)
  5. 6. Clump over a few hundred meters wide held together by its own gravity
  6. 9. Heat produced while a planet was forming (2 words)