... Moons and Rings Before Saturn . ... Rhea, one of Saturn's larger moons, was caught passing Epimetheus, one of Saturn's smaller moons. The Galactic Center in Infrared from 2MASS . ... In visible light, much of the Galactic Center is obscured by opaque dust. ... Black Holes in Merging Galaxies . ... The tantalizing sky above features a colorful lunar corona, where bright moonlight is diffracted by water droplets in the thin clouds drifting in front of the lunar disk. ... Dark Filament of the Sun . ...