The thin haze of intergalactic dust dims and reddens the light from background quasars ... The anomalous arms appear as purple and blue emission. Galaxy NGC5291 (orange, at the center) and ...

A gravitational lens is created when a massive object, in this case the core of the supermassive galaxy, distorts its local space. Light from a background galaxy, in this case two galaxies ...

A surprising number of dark matter clumps in distant clusters of galaxies severely warp background ... investigate 11 galaxy clusters from about 2.8 billion to 5.6 billion light-years away.