[yongjik]

IANAP, but I think the most widely accepted view on dark matter is that it is made of "dark" particles that cannot lose energy by radiation. In other words, it cannot condense and form dark stars or planets. When two lumps of dark matter collide they just pass through each other.

Sorry for ruining your dream. :/

[pavel_lishin]

Yeah, I googled around after my comment, and that explained it pretty well - it apparently also explains why most of the dark matter is in halos around galaxies, since it can't slow down enough to collapse into galaxies themselves, and is on mostly highly elliptical orbits, spending most of the time away from whatever it's orbiting.

I can still dream, though.