Let me start by saying I haven't searched hard enough. If Dark Matter is is 84% of the mass in the universe, and has only a gravity interaction (for the purpose of this question all other interactions are irrelevant) it seems to me that it should clump mixed in with the regular matter. If this is the case why then wouldn't our own sun, and planets be 84% dark matter? I realize there is a reason out there, but can someone link me a good, detailed reason, or even better, explain it here? Thank you.