Virtual maps provide birds-eye view of Titans Earth-like landscapes

March 25th, 2009 - 3:11 pm ICT by ANI  

Washington, March 25 (ANI): Scientists have made new virtual topographic maps of Saturns moon Titan, which provide a birds-eye view its Earth-like landscapes.

Cassini radar team member Randy Kirk with the Astrogeology Science Center at the U.S. Geological Survey in Flagstaff, Arizona, created the maps.

He used some of the 20 or so areas where two or more overlapping radar measurements were obtained during 19 Titan flybys.

These stereo overlaps cover close to two percent of Titans surface.

The process of making topographic maps from them is just beginning, but the results already reveal some of the diversity of Titans geologic features.

The new flyover maps show, for the first time, the 3-D topography and height of the 1,200-meter (4,000-foot) mountain tops, the north polar lake country, the vast dunes more than 100 meters (300 feet) high that crisscross the moon, and the thick flows that may have oozed from possible ice volcanoes.

These flyovers let you take in the birds-eye sweeping views of Titan, the next best thing to being there, said Kirk.

Weve mapped many kinds of features, and some of them remind me of Earth. Big seas, small lakes, rivers, dry river channels, mountains and sand dunes with hills poking out of them, lava flows, he added.

The maps show some features that may be volcanic flows. These flows meander across a shallow basin in the mountains.

One area suspected to be an ice volcano, Ganesa Macula, does not appear to be a volcanic dome. It may still have originated as a volcano, but its too soon to know for sure.

It could be a volcanic feature, a crater, or something else that has just been heavily eroded, said Kirk.

The stereo coverage includes a large portion of Titans north polar lakes of liquid ethane and methane. Based on these topographical models, scientists are better able to determine the depth of lakes.

The highest areas surrounding the lakes are some 1,200 meters (about 4,000 feet) above the shoreline.

By comparing terrain around Earth to the Titan lakes, scientists estimate their depth is likely about 100 meters (300 feet) or less.

More 3-D mapping of these lakes will help refine these depth estimates and determine the volume of liquid hydrocarbons that exist on Titan.

This information is important because these liquids evaporate and create Titans atmosphere. Understanding this methane cycle can provide clues to Titans weather and climate. (ANI)

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