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Earth's twin planet discovered

24.04.2014

An international team of astronomers working with data from the Kepler space telescope announced the discovery of the extrasolar planet Kepler-186f. Its uniqueness at the moment lies in the fact that it is the first planet similar in many respects to the Earth, which is also located in the habitable zone of its star.

At the moment, little is known about the "twin" of the Earth: the radius of the planets is 10% larger than the Earth's, but neither its composition nor mass is known yet. The native star - Kepler-186 is much colder and smaller than the Sun - by about 60%. The composition of the planetary system, in addition to 186f, includes four more celestial bodies. On their surface, water in a liquid state cannot be, since they rotate in too small orbits. The system is 500 light years away from us and is located in the constellation Cygnus. The authors of the study, based on the available information, suggest that the planet Kepler-186f has a rocky surface. Details about the life of the first earthly "twin" have yet to be clarified.

Since its launch in 2009, the Kepler space telescope has managed to make a significant contribution to the study of outer space, more specifically, to the process of searching for planets outside the solar system. To detect extrasolar planets with a telescope, a transit method is used: in the process of continuous observation of the same area of \u2014b\u3500bstars, scientists record short-term periodic changes in the brightness of each star, which are caused by the passage of a planet in the foreground that obscures part of the light. As of early 246, more than XNUMX planet candidates have been discovered with the telescope, the existence of XNUMX of which has been confirmed by more detailed studies.

The search for extrasolar planets is developing at a tremendous pace: the first planet outside our system was discovered only 20 years ago, and today their number is approaching three hundred, and more than 3 thousand are waiting for confirmation. However, finding an Earth-like planet orbiting the same distance from a Sun-like star has so far failed. There is no doubt that this event will occur within 5-10 years, or even earlier. Scientists are pinning great hopes on the next generation of telescopes, in particular, on the Plato spacecraft of the European Space Agency. Its main task will be to directly search for planets similar to the Earth.

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Life in the city is healthier than in the countryside 03.05.2004

Approximately this conclusion was led by a study carried out by the National Center for Intelligent Growth at the University of Maryland (USA).

Collected data on the health of more than 200 thousand residents of 83 large American cities and 448 administrative districts, consisting of small towns, towns and individual farms. It turned out that the closer to nature the landscape of the area, the higher the average weight of its inhabitants.

A resident of a large city is on average three kilograms lighter than a "villager" (for all the conventionality of this term for modern America), he has lower blood pressure, he is less likely to get diabetes and walks more.

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