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This graphic shows how methane boosts the abundance of water at the top of Earth's atmosphere.

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Saturn's largest and second largest moons, Titan and Rhea, appear to be stacked on top of each other in this…

NASA's Cassini spacecraft looks towards the dark side of Saturn's largest moon, Titan, capturing the blue halo caused by a…

Using a special spectral filter, the high-resolution camera aboard NASA's Cassini spacecraft was able to peer through the hazy atmosphere…

Slipping into shadow, the south polar vortex at Saturn's moon Titan still stands out against the orange and blue haze…

The globe of Saturn, seen here in natural color, is reminiscent of a holiday ornament in this wide-angle view from…