posted on Dec, 13 2007 @ 01:47 AM
That's really strange. The rate at which these discoveries are being made is mind-blowing. I'd be really interested to hear how exactly this outer
I could make a few guesses, but they would be purely speculation and probably ill-informed.
Perhaps it was another galaxy that is in the process of being cannibalized? It shows the outer halo rotating at 100,000mph while the inner disc is
rotating at 500,000mph. Perhaps the outer halo is gradually slowing down and reversing in order to conform to the rest of the galaxy. They may also
be stars that were't properly absorbed.
I know that supernovae expel a lot of material when they explode, and in some occasions rocket their star partner out of the galaxy. (I don't have
the source on hand and I may be misrepresenting it entirely.) It may be that these are stars formed from the expelled material or stars on their way
out of the gravitational pull of the galaxy.
Who knows! Any other ideas?