Discovered by "twin" of the Earth are interested astronomers

Japanese astronomers analyzed data from the Space Telescope, "Kepler" and found 15 new exoplanets. In this case, one of them, as scientists say, as two drops of water similar to our Earth. The only thing that distinguishes them, it's the size. Discovered planet, which received K2-155d index twice our homeworld. At the same time the planet is located in the "habitable zone" star allegedly has the oceans and the Earth's atmosphere, according to a paper published in the Astronomical Journal.

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"Our calculations show that this planet has to be the Earth's atmosphere and a similar structure of the subsoil, however, confirm that we are not yet. We know little about the planets orbiting red dwarfs, since the number of these stars is much lower than the total number of planets discovered in the stars, like the Sun, "- said Teruyuki Hirano of the Tokyo Institute of Technology.

Due to the Space Telescope, "Kepler" to date, astronomers have found nearly four thousand extrasolar planets very different categories. Several dozen of these worlds are potential "double" of the Earth or in the so-called "habitable zone" of their bodies. Their discovery has led planetary scientists and astrobiologists begin to develop methods that would allow to evaluate the suitability for life, or try to find traces of it in their atmosphere.

In May 2013, the telescope is out of order, but experts have found a way to continue to work within the framework of the so-called K2 mission. Before breaking "Kepler" watched only for a small area of ​​space, located at the junction of the constellations Cygnus and Lyra. After returning to the system of the telescope observes the different parts of the sky, as NASA experts to constantly rotate it so that sunlight does not hit the lens. Despite this, the mission K2 "Kepler" has already managed to discover many new planets. With regard Hirano and his team, their work focused on the analysis of data collected by the telescope during the first three years after the "resurrection". The researchers said that they were interested in the celestial bodies orbiting not sunlike stars and red dwarfs - small, dim stars, living for a long time compared to other types of light and tranquil character (though, as it turned out, and they can cause surprises). Over the past two years, astronomers have discovered several star systems and exoplanets. These also include Proxima b and seven small worlds from the Star TRAPPIST-1. The new systems have guided astronomers thought that the first full analogue of the Earth will be opened in the red dwarf, rather than near the sun twin.

Hirano said that "Kepler" was originally designed to search for planets around a bright and large stars that have complicated the search for faint red dwarfs whose brightness hardly changes at the time when they are companions of disco light, reducing its luminosity.

Combining the data collected "Kepler" and ground-based observatories operating in the infrared and optical regions, has solved the problem of observation. Scientists are now able to determine what reduction in brightness caused by planets were, and what - the processes occurring inside the stars themselves.

As a result, Japanese astronomers have found just 15 new heavenly bodies, similar in size to the enlarged copies of the Earth. They all revolve around their stars at a very short distance - a year on the surface lasts from one to 40 days. According to scientists, almost all the discovered planets are unlikely to support life. Temperature and climate they have more like Venus. The only exception from the list - K2-155 system. It is located in the constellation Taurus and is about 200 light years from Earth. It has just three "super-Earths", the furthest of which, K2-155d, located in the central part of the "habitable zone" and, according to planetary scientists, should be similar in its climate and hydrological conditions on Earth.

Check all of these assumptions, according to Hirano, it will be possible in the near future. In the end, NASA plans to launch into orbit a telescope TESS, which will be the successor of "Kepler". The device is able to get the first accurate data on the composition and temperature of these planets and will check whether we are talking about a full-fledged "big sister" of the Earth.