The Ring Nebula (M57): Gas cloud from a dying nearby sun-like star
[CLICK ON IMAGE FOR HIGH RESOLUTION], NASA, ESA, and the Hubble Heritage The Ring Nebula (M57) is probably [next to Saturn’s rings] the most famous celestial band. … The recent mapping of the expanding nebula’s 3-D structure, based in part on this clear Hubble image, indicates that the nebula is a relatively dense, donut-like ring […]