Comment Re:Dark Matter? (Score 1) 59
So if they haven't even accounted for a significant fraction of our own galaxy, what does that mean about dark matter?
As far as I can tell from a bit of quick research, absolutely zilch. Since dark matter is mainly hypothesized to explain the observed motion of galaxies, and most of the evidence for it comes from observing other galaxies and, especially, galactic clusters, the size of the Milky Way has no bearing.
Also, as someone else pointed out, this is about volume in any case; the actual mass of the Milky Way is probably not a lot different from previous estimates—but all estimates of the size and or mass of the Milky Way are necessarily rough in any case, since it's too close to see very well.