Mars' ice-filled crater 'Korolev' seen in video animation
An animation based on images taken by the ESA's Mars Express showcases the 82-kilometre-wide Korolev Crater on Mars. Located in the northern lowlands of the Red Planet, south of the large Olympia Undae dune field that partly surrounds Mars’ north polar cap, this well-preserved impact crater is filled with water ice all year round. The crater’s floor lies two kilometres below its rim, enclosing a 1.8 km thick domed deposit that represents a large reservoir of non-polar ice on Mars.

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