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Frozen world Titan probe shows Saturn moon's orange surface
DARMSTADT, Germany -- Pictures snapped by the Titan probe and a low, whooshing sound picked up by an on-board microphone drew gasps and applause from scientists Saturday, as the mission to Saturn's moon continued its breathtaking revelations from more than 900 million miles across the solar system.
Data beamed back from Titan, one of Saturn's moons, sketched a picture of a pale orange landscape with a spongy surface topped by a thin crust.
Scientists at the European Space Agency were clearly excited about the success of the mission, which had confirmed some long-held theories and produced startling surprises.
"I have to say I was blown away by what I saw," lead scientist David Southwood said at the agency's headquarters in Darmstadt. "It was an extraordinary experience to look at some of the stuff."
Images taken on descent, from about 12 miles right down to the surface, suggest the presence of liquid, possibly flowing through channels or washing over larger areas, said Marty Tomasko of the Lunar and Planetary Laboratory at the University of Arizona in Tucson.
"It is almost impossible to resist speculating that the flat, dark material is some kind of drainage channel, that we are seeing some kind of a shoreline. We don't know if it still has liquid in it," Tomasko said.
A thick layer of cloud or fog that obscures the planet was found to be hanging at about 12 miles from the surface, but absent closer to the ground.
The clouds are most likely methane and dark areas on the surface are "a reservoir" of liquid methane, said project scientist Shushiel Atreya.
A boom mike extended from the 705-pound Huygens probe has captured a loud, rushing sound. Mission scientists did not immediately say what it might mean, but instruments on the probe have detected winds of about 15 mph.
Titan is the first moon other than the Earth's to be explored. Scientists believe its atmosphere may be similar to that of the primordial Earth and studying it could provide clues to how life began on our planet.
Huygens was spun off from the Cassini mother ship on Dec. 24 before it began its 2 1/2-hour parachute descent on Friday, taking pictures and sampling the atmosphere before landing on Titan, where temperatures are estimated at 292 degrees below zero.
Scientists want to know whether Titan has lightning and if it has the seas of liquid methane and ethane that have been theorized. Both ethane and methane are gases on Earth, but are believed to exist in liquid form on Titan.
The probe is sending data to NASA's Cassini mother ship above Saturn, which relays them to the ESA by way of NASA. The mission was launched in 1997 from Cape Canaveral, Fla., a joint effort by NASA, ESA and the Italian space agency. It is named for 17th-century Saturn observers Jean Dominique Cassini and Christiaan Huygens.
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