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Images sent back from Titan by Huygens show river channels and deltas carved by methane rain.

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Images show a dark plain on Titan, apparently showing flow of fluid around bright "islands".

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A bright linear feature may be an area where water ice has been extruded on to the surface. In the lower part of the image, stubby, dark channels may be liquid methane springs.

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The probe took seven years to reach its destination. The probe landed on a boundary between the dark and light material on the surface.

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This colour image shows the surface of Titan is bright orange with a tangerine sky. Scientists believe the pebble-sized boulders may be ice blocks.

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This shows part of a full 360-degree view around Huygens. As the probe descended it drifted over a plateau (centre) as it headed towards its landing site.

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Measurements suggest the area it landed on has the consistency of "creme brulee" and may have once been flooded.

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The dark areas may be smog particles that have been washed off water ice into channels and basins, where they gather.