NASA may think Saturn's moon Tethys looks like "an eyeball staring into space", but we can't help thinking of a more ominous resemblance: the Death Star.

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A snap from NASA spacecraft Cassini shows one of Saturn's large, icy moons – complete with an enormous crater, named Odysseus.

https://twitter.com/realryanlillis/status/823640772792766465

The space agency explains: "Like any solar system moon, Tethys (660 miles or 1,062 kilometers across) has suffered many impacts. These impacts are a prime shaper of the appearance of a moon's surface."

https://twitter.com/mechacoda/status/823581816544231426

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Here's hoping it's not fully operational.

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