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Space Saturn moon Titan may have ice floating in lakes This artist's concept envisions what hydrocarbon ice forming on a liquid hydrocarbon sea of Saturn's moon Titan might look like. Image released Jan.

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As the area continues to warm, the ice should melt, producing an entirely liquid surface that will look darker to Cassini, researchers said.

We also know where some of those planets are. I don't bet on horses or football pools, either. Not everyone is as willing to nail down a timeline, though they're all hopeful. That could take SETI, as it currently operates, lookint little as two decades.

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By making smart choices about which stars are likely to sustain life, we should be able to find someone or something by searching just 1 million stars, Drake originally estimated. The values of many of these factors are highly speculative, but Drake himself looklng their product to be 10, — as in, there are 10, civilizations transmitting als in our galaxy at any given moment.

While Earth's weather cycle is based on water, Titan's involves hydrocarbons, with liquid ethane and methane falling as rain and pooling in large lakes and seas. We now know that perhaps 1 percent of stars have planets where biological life may arise.

The Drake Equation determines the of intelligent and al-transmitting civilizations in our galaxy by multiplying exhra string of factors, including the of stars, the fraction of those that have planets, the fraction of those that are habitable, tor probability of life arising on such planets, the likelihood of that life becoming intelligent, and so on. Space Saturn moon Titan may have ice floating in lakes This artist's concept envisions what hydrocarbon ice forming on a liquid hydrocarbon sea of Saturn's moon Titan might look like.

The more planets the better! Fifteen to 20 years Scientists use an equation formulated by Drake in the s to estimate how long it will take to find intelligent life.

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Image released Jan. Alien-hunters add newfound super-Earths to their list Sept. On Monday, astronomers at the Tbe Southern Observatory in Chile announced the discovery of 16 new "super-Earths," planets orbiting distant stars that are smaller than gas giants and most likely have rocky surfaces where life could gain traction. When the SETI team s its radio al-scouring next week, the new super-Earths will be first on its telescope target list.

Similarly, Tarter wrote, "I'm not inclined to put a timetable on success.

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You have to make many tries, just as winning the lottery requires the purchase of many tickets. Fundd SETI astronomers could find life on their very next try, doing so will probably require scouring the skies for years.

But the new study suggests that things are not so simple. The presence of such ice floes in the ethane and methane seas on Titan would make the moon an even more exciting target for astrobiologists, researchers said. The researchers created a model investigating how Titan's seas interact hTe the moon's nitrogen-rich atmosphere, creating pockets of varying composition and temperature.

Because there are billion stars in the galaxythe math says one in 10 million star systems will be sending radio als our way at any given time. Cassini scientists had ly assumed that these seas would not have floating ice, since solid methane is denser than its liquid counterpart and should thus sink. It will continue to observe the ringed planet and its many moons through at least The team determined that hydrocarbon ice should indeed float in the moon's seas, as long as the temperature is just below methane's freezing point — minus degrees Ieland, or minus degrees Celsius — and the ice is at least 5 percent "air," which is the average composition for young sea ice here on Earth.

As this gitls, ice may rise to the top, creating a surface that appears brighter and more reflective to Cassini's radar instrument. This ice may be colorless, perhaps with a reddish-brown tint provided by Titan's atmosphereresearchers said.

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The strongest candidate among the newfound super-Earths is known as HD b: It resides in its star's "habitable zone," looklng the temperature could be just right to sustain liquid water — the elixir of life as we know it. If the temperature drops a few degrees, the ice will begin to sink, researchers said.

Titan's northern spring is underway, meaning lakes and seas in the moon's northern reaches are warming up. The 16 new candidates a list of 54 others discovered earlier this year by NASA's Kepler spacecraft.

Cassini should be able to test the new model out, and soon.