Scientists Spy Galactic “Traffic Jam"
by AMNH on
Astronomers have spotted a rare, complex cosmic collision of four galaxy clusters 5.4 billion light-years from Earth. A spectacular composite image from NASA's Chandra X-Ray Observatory and Hubble Space Telescope revealed the pileup—and its likely source.
A nearby filament of galaxies is driving the pileup. The hot gas shows that the filament is falling into the clusters causing the collisions and driving the cluster's evolution.