10F_p_Form_ss_atm - Formationofearth&solarsystem

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Formation of earth & solar system
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      Features of the SS that must be explained: (1) 99.85% of the mass of the SS is in the sun (2) SS is disk-shaped - planetary orbits lie in approximately the same plane (3) Planets revolve around the sun in the same direction
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Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto terrestrial    inner    rocky   Jovian    outer  gaseous (4) Two different types of planets Terrestrial (earth-like) and Jovian (Jupiter-like)
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Big Bang Explosion ~ 15 billion years ago Universe expanded and cooled (still expanding) Left pockets of gas - collapse to form galaxies
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Nebular hypothesis  (Kant - Laplace hypothesis)
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Trifid nebula
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Collapse begins Triggered by shockwave? Most material falls to center - form proto-sun
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10F_p_Form_ss_atm - Formationofearth&solarsystem

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