The Solar System:
Origin: the nebular theory fits most of the facts.
The nebular theory:
1. The Big Bang produced lumpy clouds--COBE satellite.
2. Recycled star stuff with heavier elements combined with H and He gas
     from Big Bang, and gravity pulled it together. 
There were two supernova in our region.
3. The gas cloud collapsed to a spinning disk and a globe in the center. 
4. It heated as it collapsed, the center hotter than outer regions:
        Helmholtz contraction or heating.
5. The sun's magnetic field slowed its rotation by dragging on
     electrons.
6.  There were swirls formed to predate satellite systems.
7.  The inner regions were too hot to allow light gases to collect.
       This left heavier elements and produced terrestrial planets.
8.The outer regions were cool enough to allow large amounts of H and He
       to collect into the Jovian Planets.
9.Dust collected into planetesimals, planetesimals into protoplanets.
      Gravity smoothed the larger objects to spheres.
10. All planets, the sun, and satellites rotated and revolved in the same direction
       (prograde). Some planets (Venus, Uranus and Pluto) rotate retrograde
       because of large collisions (Velikovsky).