Iconic Rings And Flares Of Galaxies Created By Violent, Intergalactic Collisions
Friday, November 21, 2008 - 15:21
in Astronomy & Space
The bright pinwheels and broad star sweeps iconic of disk galaxies such as the Milky Way might all be the shrapnel from massive, violent collisions with other galaxies and galaxy-size chunks of dark matter. New findings challenge a longstanding theory.