Astronomy Picture of the Day

Cratered Cliffs of Ice on Saturn's Tethys

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#80983 by @ 13.10.2005 00:00 - nach oben -
Cratered Cliffs of Ice on Saturn's Tethys


The surface of
moon Tethys is riddled with icy cliffs and craters.

The most detailed images ever taken of
were captured late last month as the robot
Cassini spacecraft
swooped past the frozen ice moon.

The above image was taken from about 32,000 kilometers distant and
shows a jagged landscape of long cliffs covered with craters.

At the bottom of many craters appears some sort of unknown light-colored substance,
in contrast to the unknown dark substance that appears at the bottom of Saturn's moon

Tethys is one of the
larger moons of Saturn, spanning about 1,000 kilometers across.

The density of Tethys indicates a composition
almost entirely of
water ice.

is thought to have been predominantly liquid sometime in its distant past,
creating some of its long ice-cliffs
as it cracked during

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