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Why dark matter is more diffuse than ordinary matter

It appears that galaxies form around clumps of dark matter, so the large scale structure of the universe is determined by the distribution of dark matter, and ordinary matter is attracted to these clumps of dark matter to form the galaxies we see today. Given that it is dark matter that clumps together first, and only then is ordinary matter attracted to these clumps to form galaxies, why is it ordinary matter that ended up being clumped in much more dense objects such as stars or galaxies? It's been a question that has been plaguing me for a while, so I asked about it on Astronomy Cast.

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