Sunday , December 5 2021

Rain of rocks with high supersonic winds



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The lava of a planet (a planet covered with liquid lava on the surface) is a class of rocky exoplanets that orbit next to its stars, part of the surface of which is said to have melted. New sci.

Under such conditions, the temperature can be so high that the atmosphere is filled with smoke from the rocks.

Theoretical reflections on these planets have been published for some of them: CoRoT-7b, Kepler-10b, 55 Cnc e, KIC 12556548 and HD 219134b.

“Our study is the first to be based on the conditions on planet K2-141b (K2-141b), thanks to a new generation of telescopes that can be seen from where it is hundreds of light-years away, such as the‘ James Web Space Telescope ’,” he said. Giang Nguyen, PhD student at the Center for Earth and Space Sciences at York University.

The scientific team that includes Giang has found that about two-thirds of the planet K2-141b is permanently lit, unlike the alternative lighting of coffee that we are accustomed to on Earth.

The light-free part of the planet does not look attractive because its temperature averages 200 degrees Celsius.

The illuminated side, on the other hand, seems uncomfortable, because here the temperature is about 3,000 degrees, which is enough not only to melt the rocks but also to turn them into steam.

“What we found was that the atmosphere extends slightly wider than the magma in the ocean, which made it easier for us to see with a telescope,” said astronomer Nicholas Kovan, a professor at McGill University.

Surrounding rocks in nature

As water evaporates from the earth, breathes into the atmosphere, condenses, and falls in the form of rain, so do sodium, silicon monoxide, and silicon dioxide in planets K2-141b. Rain on earth falls into the oceans when it evaporates again and the cycle repeats itself.

In K2-141b, mineral steam from rocks is carried by supersonic winds, where it cools and hardens and falls as rain into the magma ocean.

Then again the hot side of the exoplanet arrives, the rocks evaporate again and the whole process is repeated.

However, the K2-141b cycle is not as stable as the Earth’s water cycle. The return of rock magma to the ocean is slow, which is why scientists predict that the planet’s surface and atmosphere will change completely over time.

“All the rocky mountains, including the Earth, began to live in their worlds in this way, but they quickly cooled and hardened. The lava of the planet allows us to know the initial phase of the planet’s evolution,” says Professor Kovan.

The research was published in Monthly notes from the Royal Astronomical Society.

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