Astronomers have studied the atmosphere closest “twin Earth”


First time scientists were able to “taste” the atmosphere nearest earth-like planet in the star system of TRAPPIST-1 and confirm that it is the analogue of rocky Land with potentially viable atmosphere.

“When we learned that two of the three planets in the system will be on the disk at the same time, we thought, maybe the guys from the science team the Hubble will agree to give us time to conduct observations. We wrote the application in just a day, sent it, and it was approved immediately. Now we have the first ever spectroscopic observation of such a “double” pass, which allowed us to study the atmospheres of these planets in one sitting,” said Julien de wit (Julien de Wit) from the Massachusetts Institute of technology (USA).

In may this year, de wit and his colleagues announced the discovery of a very unusual star system in the neighborhood of the Earth – TRAPPIST-1 remote from us only 40 light-years towards the constellation of Aquarius. All three planets orbiting this red dwarf star, are inside the so-called “zone of life”, where water can exist in liquid form, and presumably have a mass comparable to earth’s.

Thanks to the help of members of the research team, “Hubble”, just two days after the announcement of the opening of the TRAPPIST-1, the authors had the opportunity to see how the rays of light “flash” of the atmosphere the second and third planets in the system (TRAPPIST-TRAPPIST 1b and-1c) during their motion across the stellar disk.

As the scientists explain, when the light rays pass through the planet’s atmosphere towards the Earth, they “printed” information about its chemical composition, density, thickness, and even speed of motion of winds in it. Such data are essential for evaluating the habitability of distant aksamitov and disclosure of their essence – whether they are earth-like planets, or gas giants like Jupiter or Neptune.

The atmosphere and the other planets were narrow and thin, eliminating the possibility that they are gas giants. Their air, according to spectroscopy, can contain large amounts of water, carbon dioxide, oxygen and nitrogen, whose shares and stock is difficult to determine from the available data. The potential presence of clouds, according to scientists, it difficult to accurately determine the composition of the atmosphere and evaluate the viability of the TRAPPIST-TRAPPIST 1b and-1c.

In addition to the composition of the atmosphere, this is a rare occurrence allowed scientists to measure the average air temperature on these planets. On the second planet she is 92 degrees Celsius, which is hardly compatible with life, and the third is a more comfortable 41 degrees Celsius. Further observation of this system with the help of Hubble and other telescopes, as I hope the authors will help you understand whether they are suitable for the origin of life or only Earth-like in appearance.

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