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entropy and gravitation
"Richard D. Saam" wrote:
The solution is that it is a matter of temperature. That a lumpy distribution has higher entropy than a smooth distribution as soon as gravity is involved is only true for low temperatures. For high temperatures, the smooth distribution still has the higher entropy. That's why the universe has to be cold enough before galaxies and stars can form. In as much as galaxy and star planetary system size distributions are different, are two different formation temperatures required within the concept of Jeans' length? As you can read he https://en.wikipedia.org/wiki/Jeans_...eans.27_length Jeans' length depends on T^(1/2) for constant mass density and constant G. So, for high temperatures, the length is very big, allowing only for big clouds to collaps, e.g. a proto-galactic cloud to form a galaxy, whereas for low temperatures, also smaller clouds can collaps, e.g. a proto-stellar cloud to a star. |
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