Eight worlds of the solar system in which we could find life
Our modest capabilities Universum show that only our home planet Earth has confirmed signs of life. But the raw materials necessary for life, there is everywhere, from the bowels of the asteroid to the interstellar gas clouds and protoplanetary nebula. Chemical combinations associated with the building blocks of life, even the most complex organic molecules are practically everywhere, wherever you look. However, perhaps we will not have to look too far to find a life - eight worlds besides Earth in our solar system may also offer unique opportunities for search and detection of organic, biological activity.
The signatures of organic life-giving molecules found throughout space, including the largest star-forming regions nearby: the Orion Nebula
In truth, there is a great gulf between the organic molecules and the fact that today we call living organisms. Although there are many interesting features which might find life unknown to us, yet we have not found anything on the other worlds that might find a "live" as you did not find the remains of a past life. But the solar system - a great place to start your search, because is close at hand. Without knowing for sure, we can only guess at, where else, other than Earth, could find life. Here is a list of the top eight options, from least likely to most likely composed by Ethan Siegel with Medium.com.
Europe, one of the largest satellite of the solar system, revolving around Jupiter. Under her frozen, icy surface has a quite warm ocean of liquid water, heated by tidal forces of Jupiter
The second largest moon of Jupiter, Europa may at first glance seem to be too far from the sun to be a good candidate for life. But in Europe, there are two specific things: a lot of water - more than on Earth - and some internal heating due to tidal forces of Jupiter. Under ice surface Europe holds great ocean liquid water, and heating of its inner parts due Jupiter gravity can create a situation highly reminiscent of vitalizing hydrothermal vents at the bottom of the Earth's oceans. It is unlikely that life in Europe is similar to the one we have on the Earth's surface, but a life that can survive, reproduce and evolve, will still be the life of her by any name.
to One of the most intriguing - and less demanding - the life of brainstorming in the ocean of Enceladus is to launch a probe by the eruption of a geyser, collecting samples and analyzing them for organic compounds
Icy moon of Saturn is less than in Europe, and it has less water, but below the surface there is a unique liquid ocean (kilometer under the sea of ice). He spews giant plumes of water into space. These geysers and gave us to understand that there is liquid water, and combined with other elements and molecules necessary for life, such as methane, ammonia and carbon dioxide, under the oceans of the world could well be life. Europe is warmer, it has more water, which means - as we think - more chances. But do not write off Enceladus off, because it is thinner ice surface and where spectacular eruption. Therefore, we can find life with the help of the orbital mission, and we will not even have to drill the surface.
Withered River indicate a water-rich Mars in the past,
Once the Red Planet was pretty much like Earth. In the first billion years of the life of the solar system the water flowed freely on the Martian surface, carving on it the river, where they accumulate in lakes and oceans, leaving clues that can help us today. The features that are associated with the water the past, such as beads of hematite (which, incidentally, is often associated with life on Earth), are quite common. In addition, the rover "Kyuriositi" has found an active underground and variable source of methane, which can indicate a life-preserved today. Today, as we know, liquid water is still present on the surface of Mars, albeit in very salted. But is there life on Mars? whether it was? This we have yet to find out.
The surface of Titan the clouds contain methane lakes, rivers and waterfalls. How about you?
Enceladus could be the most likely haven of life in the Saturn system, if we did not suppose that it can unearthly type. Perhaps life is different from biological systems, we are used to on Earth? With an atmosphere that is more dense than the planet's second largest moon in our solar system - Titanium - stores liquid methane on the surface: the oceans, rivers and even waterfalls. I would be able to use the methane life on another planet in the same way it uses water on Earth? If the answer is "yes", then on Titan today could live organisms.
The surface of Venus, taken the only spacecraft that landed successfully and transmits the data to the world
Venus - a living hell. Surface temperature nearing 482 degrees, so that no device was not able to survive more than a few hours, landing on the red-hot planet. However, it is not scorching due to the surface, and due to a dense and rich in carbon dioxide atmosphere, sheltered with warm blankets of sulfuric acid. The surface of Venus is obviously quite unsuitable for life, but to live it is possible not only on the surface. If you go up to a height of 100 kilometers, in the upper clouds of Venus environment is remarkably similar to the earth: the same temperature, pressure, less acidity. It may well be that having its own unique chemical history of this medium is filled with a carbon-based life.
The spacecraft "Voyager 2" made it a color photo of the moon Triton Neptune August 24, 1989 from a distance of 550 000 kilometers. This image was compiled from images passed through the green, violet and ultraviolet filters
You almost certainly have not heard anything about the largest satellite of Neptune, but he is the most amazing and unique among all the worlds of the solar system. It 'smoked' black volcanoes, it rotates completely wrong and came out of the Kuiper Belt. Being larger and more massive than Pluto and Eris, he once was a king of the Kuiper belt objects, and now, being in orbit last planet in our solar system, it demonstrates the presence of a number of important life materials, including nitrogen, oxygen, frozen water and methane ice. Could some form of primitive life to exist in the wilds of energy? It is!
This world map shows the surface of Ceres in saturated colors, covering infrared wavelengths beyond human visible range
It may seem strange to the very possibility of the existence of life on this asteroid. But when asteroids fall on the Earth, we find not only the 20 amino acids necessary for life, but also 100 other: the building blocks of life everywhere. Could the biggest asteroid of all of these, showing the white salt deposits on the bottom of their bright craters, actually boast of their lives? Although the answer is "probably not", we should not forget that it was a collision between asteroids and Kuiper belt objects brought raw material for primitive life that appeared on Earth. Although we admit today that the active biology could appear before the formation of the Earth. If so, the life of the signatures could be locked into worlds like Ceres, which is considered the best candidate for finding life. Only need to take a closer look.
The atmosphere of Pluto, filmed "New Horizons"
Who would expect that the most distant planet from us our system - the temperature at which is close to absolute zero - will be a candidate for a haven of life? Yet Pluto has an atmosphere and extremely interesting surface features. He's got ice, like the Triton, and something resembling the Earth's atmosphere and the ocean. How about you? "New Horizons" provided us with a wealth of information, but to make sure, we have to plan a mission to Pluto, which falls on the surface. We always thought that alone in the solar system, and the incredible universe, and yet it is only a side effect of searching for such as we, the same life. If we go and explore all the possible places to live, not only can we find the familiar life, but also unfamiliar. The probability is, and it is not zero. Whenever we feel hopelessly lonely, the universe was a fabulous way to reassure us.