I think edlloyd probably meant 'theory' as aposed to a rough idea, he probably just used the wrong word. Yeah, it may take a bit of cash to test the model of the birth of the solar system on a computer. You can't prove it like that anyway, you can only test whether or not it's possible. It's not like you can build a time machine and go back and observe it. You have to construct a theory about the past based on what you know about the present. Anyway, can you elaborate a bit more on the theory you mentioned. No worries if you can't...