Found a planet similar to earth where the rains

As the portal livescience.comcanadian astronomers find potentially habitable planet which with high probability are familiar to the human eye rains. However, despite the fact that the found planet K2 18b is officially recognized as one of the most likely worlds in the origin of alien life, some of the conditions on its surface forced scientists to seriously reconsider its hastily released statement. So what’s wrong with this distant exoplanet?

K2 18b, the first exoplanet with confirmed presence of rain

What the world looks like a twin of the Earth?

The world is K2 18b — a twin of our planet. Data from space telescopes, and numerous computer models show that the atmosphere of this exoplanet really contains a large number of water vapor, which can be the key to a successful search for extraterrestrial life. Astronomers first spotted the planet in 2015, using its detection by the telescope “Kepler”. It was then revealed that K2 18b turns around its star-a red dwarf at a distance that falls under the definition of “Goldilocks zone”, making remote on 111 light-years from the Sun the world is potentially habitable.

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In order to understand whether there are on the planet of any atmosphere, a group of canadian astronomers decided to study discovered the world through the Hubble telescope at the moment when K2 18b passed in front of its star, absorbing thus part of its radiation. Based on the data on which wavelengths of the star absorbs light of a hypothetical atmosphere of the exoplanet specialists is able to determine the composition of its constituent molecules. So, thanks to the analysis of the data, the astronomers were able to determine that the remote world really has an atmosphere consisting of steam, hydrogen and helium.

Angelos Tsiaras, an astronomer from University College London, argues that all the planets that humanity had observed the atmosphere with water vapor, by their nature, were gas giants such as Jupiter or Saturn. Exoplanet K218 b this plan can be a real exception to the rule because of its unique location relative to its star size and the fact that a watery atmosphere.

18b K2 exoplanet 2 times more and 8 times more massive than Earth

By combining the data of the telescope “Spitzer”, “Hubble” and “Kepler”, scientists have found unique information about the characteristics of the atmosphere of exoplanets. It is known that over the distant exoplanet flying clouds, which are formed at a certain point K2 18b. Knowing the location of this climate, the scientists were able to conclude that the place that “produces” clouds of extrasolar planets has the correct pressure and temperature for formation of liquid water and its condensation as rain.

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Despite the fact that the planet has been successfully proved the existence of rain, the researchers believe that the local raindrop can never reach the planet’s surface. The fact that K2 18b may simply not have a solid soil because of its very low average density, which immediately puts exoplanet in a row with the so-called mini-Neptune.

Despite all doubts concerning distant exoplanets, scientists hope that the launch of the telescope the new generation James Webb will be able to lift the veil of secrecy surrounding K2 18b. Whether or exoplanet is a conventional gas or water world, or are we dealing with some other, still unknown to us the state of matter? Well, time will tell. In the meantime, I suggest you subscribe to our channel in Yandex.Zen, where you can find more useful information from the world of science.

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