Ultrasonic winds, stone rains in the exoplanet weather report



Oceans, winds, rains. Apparently, the weather is reminiscent of Earth. Only here the seas are made of lava and from the sky no water falls but stones. We are at K2-141bm, a planet orbiting a small, orange star in the constellation of Pisces, almost 200 light years away from Earth. No modern telescope can detect it directly, but its presence was detected by indirect techniques. In a study now published in the prestigious Monthly Notices of the Royal Astronomical Society, researchers in Canada and India use computer models to simulate the atmosphere. K2-141bm, which has a mass slightly larger than Earth and is thus classified as “super-Earth”, boils at extreme temperatures due to its extremely short distance from its parent star. Due to gravitational interactions, one side of the exoplanet looks permanently at the star, while the other remains permanently immersed in darkness (one side of the Moon looks permanently at the Earth due to the same phenomenon). As a result, researchers estimate, the night side remains frozen at -200 degrees Celsius, while on the bright side the temperature reaches around 3,000 degrees Celsius. Under these conditions, all the rocks melt and form a vast ocean of lava, with a depth estimated at 100 km. A small part of the ocean lava evaporates due to extreme heating and forms a thin atmosphere – which can probably be seen by future telescopes. In addition, the extreme temperature difference between the two hemispheres causes winds that whip the surface at supersonic speeds of 5,000 kilometers per hour – at least ten times faster than the strongest winds on Earth. Water cycle, stone cycle. Vaporized rocks from which make up the atmosphere, the simulations show, are carried by the strong wind to the icy dark side of the planet, whereupon they solidify. The rocks that form fall like rain into the lava ocean and the cycle starts from the beginning. It is like the water cycle on Earth, during which water evaporates from the oceans, rises to the upper, colder layers of the atmosphere, then liquefies and falls. back to the surface to close the transport cycle. In the case of K2-141bm, the water cycle has been replaced by the rock cycle. However, the cycle of the exoplanet is not as stable as the cycle of water on Earth. Rocks that fall like rain on the frozen night side do not return easily to the circle, and researchers predict that the surface and atmosphere of the hot planet will change over geological time. However, despite the huge differences between K2-141bm and According to Nicholas Cowan of McGill University in Canada, “all rocky planets, including Earth, have begun to explore the formation of the Solar System.” their life as magma worlds before they finally cool and solidify. “” Lava planets offer us a rare glimpse into this stage of planetary evolution. The research team is now analyzing data from NASA’s Spitzer Space Telescope to confirm their estimates. for the temperatures on the bright and dark side of the exoplanet. Definitive answers for the composition of the precipitation and rock rain are expected to be delivered by the James Webb Infrared Space Telescope, which is scheduled to be launched in 2021 as the successor to the Hubble Space Telescope. Follow it on Google News and be the first to know all the latest news from Greece World, in



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