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A little interesting about space life.

If the authors' proposal is correct, then it successfully explains why Neptune's moon system looks so strange compared to Jupiter's or Saturn's--which means that astronomers' models of how these primordial systems form around gaseous giant worlds still hold strong.



and here is another

Methane and nitrogen present in Titan's atmosphere react together to create a variety of organic materials. Many planetary scientists think the heaviest materials somersault down to the surface of hydrocarbon-slashed Titan. Dr. Le Gall and her team propose that when those compounds splash into the sea, either by directly falling from the air as hydrocarbon rain, or through Titan's rivers, some are dissolved in the liquid methane. The compounds that do not dissolve, such as nitrites and benzene, sink down into the floor of this exotic sea.



and finally

The most detailed pictures of Europa show even more intriguing clues that there is slush lurking beneath its brightly shining icy surface. Slightly smaller than Earth's own beloved Moon, Europa's surface temperature could easily freeze an ocean solid over a span of only several million years. However, some astronomers think that warmth from a game of tidal tug-of-war between Europa and Jupiter, as well as other neighboring moons, could be keeping large regions of Europa's subsurface global ocean in a life-friendly liquid state. This process is termed tidal heating, and it refers to a mechanism whereby the gravitational tugs of a nearby object (or objects) flex and bend and contract and expand another object continually. This constant churning causes the victimized object, in this case Europa, to heat up and be considerably more balmy than its great distance from the Sun would otherwise allow it to be.

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The "chaos terrains" are those regions of the icy moon that are covered with shattered, scrambled, and rotated chunks of crust the size several city blocks. Galileo images show swirly and very rough-looking material between the broken blocks of ice, which indicates that the blocks may once have been lodged atop a bed of slushy stuff that ultimately froze at the very frigid surface temperatures of Europa.



The scientists modeled different temperatures and water abundances that may have been present in the Moon-birthing disk. At higher temperatures, their disk was primarily composed of silicate vapor, which formed as a result of evaporation of the mantles of both the proto-Earth and the doomed Theia. The disk at these higher temperatures also contained a relatively small quantity of hydrogen dissociated from water. In contrast, at lower temperatures, their disk was primarily composed of water, from which hydrogen did not dissociate under this cooler temperature range--thus making its escape mechanism very inefficient.



"How can this be? Is it just a matter of size? Location? What about Mercury and Venus? Did they grow on similar timescales to the Earth or on timescales more similar to Mars? I think these are some of the really important questions that we, as a community of planetary scientists, will be addressing in the future," Dr. Jacobson told the press in April 2014.

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