February 20, 2009: The first gamma-ray burst to be seen in high-resolution from NASA's Fermi Gamma-ray Space Telescope is one for the record books. The blast had the greatest total energy, the fastest motions and the highest-energy initial emissions ever seen.
massive gravity distorts the galaxies' shape and sends them ripping through the cluster at unimaginable speeds.
The Virgo Cluster is the nearest big collection of galaxies to Earth, and it's filled with a collection of gas called the intercluster medium, whose pressure drives the galaxies' own internal gas out into the cluster, roiling up the galaxies' dust.