Quote:
|
Originally Posted by mcsejung
Could it be something else? Such as "frame dragging." I recall that a test by NASA has proven that locally in earth orbit (no dark matter near the earth) that "frame dragging" does indeed occur. I'm unsure if the fabric of space itself is being moved.
But you would need a whole lot of gravity to move the space fabric itself, something on the order of a planet shows a small drag. How big would it be for gee a whole galaxy?
|
If the amount of frame dragging is what is predicted by general relativity (and the recent experimental results are in agreement with that), then no. The frame dragging cannot account for what we see. It's possible, of course, that general relativity is wrong at large scales, but so far there's no solid evidence of that, and attempts to explain the rotation curves with a modified theory of gravity have not worked so well.