Saturn's cratered moon Rhea passes in front of the hazy giant Titan in an incredible image from NASA's Cassini spacecraft, which completed its mission by diving into Saturn last September.
Cassini captured this photo of Saturn's two largest moons in visible light in 2009 using the spacecraft's narrow-angle camera. At the time, Cassini was 713,300 miles (1.15 million kilometers) from Rhea. NASA released the image on Feb. 5.
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As it explored the Saturn system, Cassini frequently swung around the planet's largest moon, Titan, and even dropped a lander to investigate its surface. The missions identified seas of methane and ethane across the moon, all shrouded in a hazy atmosphere of nitrogen, methane and organic compounds that may be similar...
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