Facts / Problems to be explained

The following list of known facts need to be explained by any theory that attempts to explain how our solar system formed some 4.5 billion years ago.

1        The dense inner planets and the much larger but less dense "Gas Giants".

2        The surprisingly Fe, O, Si and Mg rich inner planets.

 3        The over abundance of noble gases in the Gas Giants.

 4        The various planetary moons and how they were "captured".

 5        The origin of the comets. How were they formed?

 6        Why are there so many iron nickel rich meteorites and asteroids?

7        Why are there atmospheres on Venus, Earth and Triton and the four gas giants?

 8        Why are the planets orbiting in the same plane?

9       Where did all the water on earth come from?

10     Wfy is there so much deuterium on earth?

11    Where are all the extra solar planets originating from?