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The Moons of Saturn that swap orbits

Featured image: Cassini’s narrow angle camera captures three images of Epimetheus (smaller moon) passing between the spacecraft and Janus, on the 14 February 2010 [4]. There are two of Saturn’s many moons, named Janus and Epimetheus, that have an interesting relationship with each other. They are both small rocky worlds, only 196km and 135km across […]