The researchers note that they can't say exactly what alien life might look like – whether they have grey or green skin, big eyes or any other common look for alien life. Jupiter's moon Ganymede is just a little bit larger (by about 2 percent). According to one exotic theory, long ago, the impact of a meteorite, for example, might have provided enough heat to liquify water for perhaps a few hundred or thousand years. So Titan is a remarkable, and very Earth-like, world. This compound hasn’t been seen in the atmosphere of any planet or moon before. A RADAR image of Ligeia Mare, taken by Cassini in 2007 while it was surveying Titan’s North Polar region. Like Earth, Titan is known to have bodies of liquid on its surface. Titan is larger than the planet Mercury and is the second largest moon in our solar system. Titan's surface is -180°C. Titan’s atmosphere is made mostly of nitrogen, like Earth’s, but with a surface pressure 50 percent higher than Earth’s. But they might not be the best places to look for life, according to new research. The map was created seven years before the U.S. space agency is set to launch its Dragonfly mission to dispatch a multi-rotor drone to study Titan’s chemistry and suitability for life. Titan has no water, but some scientists wonder if life based on methane might live on Titan. Nonetheless, astrobiologists are studying the reactions and pathways that life might use to gain some traction on Titan—including things like breathing hydrogen and eating acetylene. Saturn's moon Titan has lakes and seas, filled with liquid ethane and methane. It is far too cold for liquid water to exist, and all known forms of life need liquid water. Credit: NASA . A circular molecule spotted on Saturn’s moon Titan may help form precursors to life. Plus, Titan is the only place in the solar system, other than Earth, with stable surface liquids: Titan has lakes and seas on its surface. In order to predict what alien life would be like on Mars and Titan, we should look to the organisms that can survive in Earth's most extreme habitats, a scientist has said. Titan has a dense atmosphere of 95 percent nitrogen and 5 … But Titan’s seas and lakes are filled with liquid methane rather than water.