[TillE]

There aren't really any satisfactory alternatives to dark matter. The question is what exactly is it, and how did it get there.

[nostrebored]

> There aren't really any satisfactory alternatives to dark matter (given current models)

Dark Matter is a fudge factor used to account for quite good, but still incomplete physical modeling.

[atty]

“Fudge factor” massively undersells it. For instance, measurements from the bullet cluster are quite compelling that there is significant mass in a galaxy that we don’t directly measure. That’s the definition of dark matter.