Even under clear skies in areas with hardly any light pollution, this view into space would look like nothing more than a round hazy splotch through binoculars. But in a newly released Hubble Space Telescope image, this globular cluster in the constellation Sagittarius is a glittering spread of jewels, scattered atop a black velvet blanket. Globular clusters are tight spherical groups of stars: disco balls of the cosmos. This one is dubbed Messier 55, or collectively the "Summer Rose Star." The... Read this story
