Last Spring, space Agency NASA with rocket company SpaceX launched a new . The objective of the unit is to search for potentially suitable planets outside the Solar system (these planets are called exoplanets), similar in its characteristics to our Land and located not far from us. In the cosmic sense, of course. An international team of astronomers working with this machine, announced the opening of a new telescope first earth-like planet that meets these requirements.
Discovered exoplanet, dubbed GJ 357d located in the system of the star GJ 357, which is located in the constellation Hydra approximately 31 light-year from Earth. Recall that a light year in astronomy is called the distance that light can cover in one earth year – about 10 trillion kilometers. The planet was discovered the so-called transit method of searching. Scientists observed the change in the level of luminosity of the star, who told researchers about the presence of the planet.
Astronomers discovered exoplanets are referred to the so-called class supertall. This planet, whose size and weight exceed our Land, but it is much lower on these parameters of the gas giants. According to scientists its mass is about six times larger than the earth. However, researchers say not yet set its exact dimensions and composition. If it is rocky, that is, the same as ours , then its size should be approximately two times larger than the earth. Around its star, the planet completes one full rotation in 56 earth days.
According to the researchers, discovered planet orbits a star class red dwarf. These stars are much smaller in size and mass than our Sun and much fainter than our sun. But such stars, believe scientists .
A Class of a star is not the only factor that increases the chances of the possibility of the existence of life on detected world. The fact that the exoplanet GJ 357d still located in so-called habitable zone of its star – the region of space where not much hot and not too cold that the water on the surface of planets could remain in liquid form. Scientists do not yet know whether the detected planet, but in the future will allow you to install that are going to run into space in the near future.
According to scientists, the average temperature of the planet GJ 357d may be about -50 degrees Celsius. Conditions on Mars. How can there be life? As the results of recent studies, even on such cold planets may be fit for survival of living organisms.
a Schema planetary system GJ 357
Astronomers report that GJ 357d – not the only planet in their system. Telescope TESS has also discovered two other exoplanets. The object called GJ 357b, about 22 percent of our Land is 11 times closer to its star than the planet mercury to the Sun. Because of this, the surface temperature of this planet is scientists estimate 254 degrees Celsius.
Another planet of the system is GJ 357с. It is located from its star is approximately 2 times on GJ 357b. Scientists estimate that the temperature on its surface is 127 degrees. Such conditions on these two planets, of course, reject the possibility of the existence on them of life.
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