Image of the Day: The Fragile Beauty of Four Minor Moons of Saturn


The moons of Saturn range from tiny moonletsembedded in the rings less than one kilometer across to the enormous Titan, which is larger than the planet Mercury. Saturn has sixty-two moons with confirmed orbits, fifty-three of which have names, and only thirteen of which have diameters larger than 50 kilometers (31 mi). The precise number of Saturnian moons in unknown, as there is no objective boundary between the countless small anonymous objects that form Saturn's ring system and the larger objects that have been named as moons. 

From left to right in this image are Epimetheus (113 kilometers, or 70 miles across), Janus (179 kilometers, or 111 miles across), Prometheus (86 kilometers, or 53 miles across) and Atlas (30 kilometers, or 19 miles across).

This view looks toward the northern, sunlit side of the rings from just above the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on July 27, 2010. 


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