Triple crescent Moons of Saturn.

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A single crescent moon is a familiar sight in Earth's sky, but with Saturn's many moons, we can see three or even more.

The three moons shown here, Titan [5,150 kilometers across], Mimas [396 kilometers across] and Rhea [1,527 kilometers across] show marked contrasts. 
Titan, the largest moon in this image, appears fuzzy because its cloudy atmosphere refracts light around the moon.

Rhea [upper left] appears rough because its icy surface is heavily cratered and a close inspection of Mimas [center bottom], though difficult to see at this scale, shows surface irregularities due to its own violent history.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 25, 2015. The view was obtained at a distance of approximately 4.3 million kilometers from Titan, 3.0 million kilometers from Mimas and 2.6 million kilometers from Rhea.

source:- nasa.gov 
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