Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. These five pairs of Hubble Space Telescope images track some of Saturn's moons as they orbit the ringed planet . By the second and third pair of images, moons Rhea and Epimetheus have joined the dance. During the Saturn ring plane crossings , the reduction in light from the edge-on rings provided an opportunity for astronomer's to explore Saturn's complex moon system and search for elusive undiscovered satellites .
Specific rights apply.