The mission has confirmed some long-held theories and produced startling surprises.
DARMSTADT, Germany (AP) -- 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.
"The closest analogues are wet sand or clay," said John Zarnecki, in charge of instruments analyzing Titan's surface.
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.
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