Comment Re:Thought that was obvious... ? (Score 1) 141
Couldn't they have gotten there pretty easily by balancing the forces? You have a mostly hydrogen ball of gas (we can tell from the spectrum of light we get).Gravity would collapse it, something needs to be pushing back at nearly the same force. Hydrogen fusion is a possible solution, do the math and yeah the fusion rate expected given the gravitational forces matches the current balance of forces re: heat expansion, solar wind and gravity. Shy of proposing some magical force that happens not using the matter we can see you are left using what you can see which is hydrogen which should be fusing given its environment. Not a proof but I don't think anything ever is. You could just say yeah fusion happens but some magic force is counter acting it, then a second magical/unknown force that spits out neutrinos happens in the opposite direction. We don't go for that because it isn't the simplest solution but I suggest we were already at the point where hydrogen fusion was the simplest solution: explains how the higher elements get created, balance of forces, why the sun is so hot etc.