In a patch of sky 3.5 billion light-years away there are hazy elliptical galaxies, colorful spirals, blue arcs and distorted shapes seen clumping together. It’s the result of a vast cosmic collision that took place over the course of 350 million years. The mess is a treasure trove of information for astronomers, allowing them to … Continue reading "Hubble Spots the Ghostly Light From Dead Galaxies"