The picture above was taken by NASA’s Cassini space probe of Titan, a moon of Saturn. The glint of light at the top of the moon is of a lake — the first non-Earth lake ever seen. In Popular Science, Jeremy Hsu writes:

A haze of methane enshrouds Saturn’s largest moon, Titan, and prevents scientists from seeing most sunlight reflections off the surface. But NASA’s Cassini orbiter managed to snap a stunning image of sunlight glinting off a huge, liquid methane lake — a smoking gun that confirms liquid in the northern hemisphere.

Titan remains the only other planetary body ...

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