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Cassini Spacecraft Finds Ocean May Exist Beneath Titan
saturndaily.com ^ | 21 Mar 2008 | staff

Posted on 03/22/2008 8:40:05 AM PDT by RightWhale

Pasadena CA (SPX) Mar 20, 2008 NASA's Cassini spacecraft has discovered evidence that points to the existence of an underground ocean of water and ammonia on Saturn's moon Titan. The findings made using radar measurements of Titan's rotation will appear in the March 21 issue of the journal Science. "With its organic dunes, lakes, channels and mountains, Titan has one of the most varied, active and Earth-like surfaces in the solar system," said Ralph Lorenz, lead author of the paper and Cassini radar scientist at the Johns Hopkins Applied Physics Laboratory in Laurel, Md., "Now we see changes in the way Titan rotates, giving us a window into Titan's interior beneath the surface."

Members of the mission's science team used Cassini's Synthetic Aperture Radar to collect imaging data during 19 separate passes over Titan between October 2005 and May 2007. The radar can see through Titan's dense, methane-rich atmospheric haze, detailing never-before-seen surface features and establishing their locations on the moon's surface.

Using data from the radar's early observations, the scientists and radar engineers established the locations of 50 unique landmarks on Titan's surface. They then searched for these same lakes, canyons and mountains in the reams of data returned by Cassini in its later flybys of Titan.

They found prominent surface features had shifted from their expected positions by up to 19 miles. A systematic displacement of surface features would be difficult to explain unless the moon's icy crust was decoupled from its core by an internal ocean, making it easier for the crust to move.

"We believe that about 62 miles beneath the ice and organic-rich surface is an internal ocean of liquid water mixed with ammonia," said Bryan Stiles of NASA's Jet Propulsion Laboratory (JPL) in, Pasadena, Calif. Stiles also is a contributing author to the paper.

The study of Titan is a major goal of the Cassini-Huygens mission because it may preserve, in deep-freeze, many of the chemical compounds that preceded life on Earth. Titan is the only moon in the solar system that possesses a dense atmosphere. The moon's atmosphere is 1.5 times denser than Earth's. Titan is the largest of Saturn's moons, bigger than the planet Mercury.

"The combination of an organic-rich environment and liquid water is very appealing to astrobiologists," Lorenz said. "Further study of Titan's rotation will let us understand the watery interior better, and because the spin of the crust and the winds in the atmosphere are linked, we might see seasonal variation in the spin in the next few years."

Cassini scientists will not have long to wait before another go at Titan. On March 25, just prior to its closest approach at an altitude of 620 miles, Cassini will employ its Ion and Neutral Mass Spectrometer to examine Titan's upper atmosphere. Immediately after closest approach, the spacecraft's Visual and Infrared Mapping Spectrometer will capture high-resolution images of Titan's southeast quadrant.

Community


TOPICS: Extended News; Government; News/Current Events
KEYWORDS: cassini; huygens; nasa; saturn; titan; water
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Some day Titan will be used as material source for space development
1 posted on 03/22/2008 8:40:07 AM PDT by RightWhale
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To: RightWhale

Ever notice that everything they find is always never seen?


2 posted on 03/22/2008 8:46:02 AM PDT by edcoil (Go Great in 08 ... Slide into 09)
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To: edcoil

No. There’s a ton that’s been found that has been seen.


3 posted on 03/22/2008 8:47:08 AM PDT by Psycho_Bunny
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To: edcoil

Of course. That is because if it were visible it would already have been found.


4 posted on 03/22/2008 8:48:34 AM PDT by RightWhale (Clam down! avoid ataque de nervosa)
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To: edcoil
Ever notice that everything they find is always never seen?

I've never seen my bones, but they've been found using X-rays and film.

5 posted on 03/22/2008 8:50:42 AM PDT by Digital Sniper (Hello, "Undocumented Immigrant." I'm an "Undocumented Border Patrol Agent.")
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To: RightWhale

So there’s water there..... why isn’t there an advanced civilization? Isn’t that all it takes for life to spring up andd then mutate to advanced civilizations?


6 posted on 03/22/2008 8:51:18 AM PDT by kjam22 (see me play the guitar here http://www.youtube.com/watch?v=noHy7Cuoucc)
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To: kjam22

Ammonia would be an excellent source of nitrogen for fertilizer when they get around to farming Mars.


7 posted on 03/22/2008 8:54:12 AM PDT by RightWhale (Clam down! avoid ataque de nervosa)
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To: Digital Sniper

..sort of like justice, I want to believe in it, but I’ve never seen it.


8 posted on 03/22/2008 8:54:44 AM PDT by norraad ("What light!">Blues Brothers)
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To: RightWhale

http://sciencenow.sciencemag.org/cgi/content/full/2008/320/3


9 posted on 03/22/2008 8:56:05 AM PDT by #1CTYankee (That's right, I have no proof. So what of it??)
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To: RightWhale
The problem with farming mars is that costs a whole lot of money. We think it's difficult just trying to match cheap labor in china.

And if we did try to farm Mars for anything... we'd end up with all the banking institutions and wallstreet sitting up derivatives to manage the transportation costs.... and the government bailing them out.

10 posted on 03/22/2008 8:57:34 AM PDT by kjam22 (see me play the guitar here http://www.youtube.com/watch?v=noHy7Cuoucc)
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To: RightWhale
Cassini Spacecraft Finds Ocean May Exist Beneath Titan
Or maybe not. But that won't stop NASA from asking for more trillions of taxpayers dollars. What folly.

11 posted on 03/22/2008 9:00:13 AM PDT by oh8eleven (RVN '67-'68)
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To: RightWhale

Did they find any dinosaur bones on Titan? All those fossil fuels there had to come from somewhere...


12 posted on 03/22/2008 9:01:27 AM PDT by stefanbatory
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To: oh8eleven

Yep... I agree with you.


13 posted on 03/22/2008 9:02:50 AM PDT by kjam22 (see me play the guitar here http://www.youtube.com/watch?v=noHy7Cuoucc)
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To: Digital Sniper

If you can see your bones unaided, you need to review the decisions you made in the last few momments - at least one of them should be rethought.


14 posted on 03/22/2008 9:03:00 AM PDT by patton (cuiquam in sua arte credendum)
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To: kjam22

Happy World Water Day


15 posted on 03/22/2008 9:04:04 AM PDT by RightWhale (Clam down! avoid ataque de nervosa)
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To: RightWhale

I still think when we find water on these other planets and moons that the evolutionists are going to need to explain why there isn’t advanced life there. Maybe they’ll claim it’s newer water than what is here on earth :)


16 posted on 03/22/2008 9:06:19 AM PDT by kjam22 (see me play the guitar here http://www.youtube.com/watch?v=noHy7Cuoucc)
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To: RightWhale
September 14th 2041.

Voyager here Houston. We have landed on Titan.

Houston: Do you have a historic observation for everyone watching.

Voyager: Roger Houston. The whole moon smells like...cat pee.

17 posted on 03/22/2008 9:07:39 AM PDT by BigCinBigD (")
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To: kjam22
evolutionists are going to need to explain why there isn’t

That will require some study. Say about 5 years and $1 billion.

18 posted on 03/22/2008 9:08:35 AM PDT by RightWhale (Clam down! avoid ataque de nervosa)
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To: RightWhale

:)


19 posted on 03/22/2008 9:09:12 AM PDT by kjam22 (see me play the guitar here http://www.youtube.com/watch?v=noHy7Cuoucc)
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To: patton
If you can see your bones unaided, you need to review the decisions you made in the last few momments - at least one of them should be rethought.

Makes my femur hurt just thinkin' about it.

20 posted on 03/22/2008 9:11:56 AM PDT by Digital Sniper (Hello, "Undocumented Immigrant." I'm an "Undocumented Border Patrol Agent.")
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