Originally Posted by ToSeek

Originally Posted by Fortunate

Seems odd that a simple, reasonable model would be overlooked for decades. Maybe other investigators just never felt the pressure-free fluid model seemed likely to be the actual way things worked.

Originally Posted by hhEb09'1

It's worth taking a look. Hard to believe that under "the weak gravitational fields under consideration" (quote from the abstract) that general relativity would make that much of a difference, though. If their (Cooperstock and Tieu, University of Victoria, with some recognition from the Gravity Research Foundation) calculations are correct, maybe the original ones (that showed a dark matter halo) are wrong.