Javascript Menu by


Galaxy cluster Abell 2744 is nicknamed Pandora's Cluster because so many different and strange phenomena have been unleashed by a huge collision that occurred over a period of 350 million years. A simultaneous pile-up between at least four separate clusters produced strange effects that have never been seen together before.

CREDIT: ESO & D. Coe (STScI)/J. Merten (Heidelberg/Bologna).