Using data from the Hubble Frontier Fields program, a team of astronomers has produced a study that indicates how globular…
In a patch of sky 3.5 billion light-years away there are hazy elliptical galaxies, colorful spirals, blue arcs and distorted…
[/caption] Abell 2744, shown above in a composite of images from the Hubble Space Telescope, the ESO's Very Large Telescope…