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Fluffy exoplanet blasted by its solar has clouds that rain sand

November 15, 2023
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Fluffy exoplanet blasted by its solar has clouds that rain sand
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Artist's impression of WASP-107b and its parent star

Artist’s impression of fluffy planet WASP-107b and its mother or father star

LUCA College of Arts, Belgium/ Klaas Verpoest (visuals), Johan Van Looveren (typography). Science: Achrène Dyrek (CEA and Université Paris Cité, France), Michiel Min (SRON, the Netherlands), Leen Decin (KU Leuven, Belgium)/European MIRI EXO GTO staff/ ESA/NASA

Big clouds product of sand soar within the skies of fluffy Jupiter-sized planet WASP-107b, in keeping with information from the James Webb House Telescope.

In 2017, astronomers found this distinctive planet, about 200 mild years away from Earth within the constellation Virgo. With the same mass to Neptune, however a radius a lot larger, nearer to that of Jupiter, WASP-107b is far much less dense than different big fuel planets, about as dense as cotton sweet. That is what makes it look fluffy, says Leen Decin at KU Leuven in Belgium.

“In reality, this fluffy planet has one of many lowest densities we’ve ever seen,” she says. “That permits us to actually look very deeply into the ambiance of that planet.”

By utilizing the James Webb House Telescope’s Mid-Infrared Instrument, Decin and her colleagues have now peered into WASP-107b.

They’ve discovered that two of the important thing elements of its ambiance are sulphur dioxide and water vapour. Sulphur dioxide has beforehand been detected on sizzling fuel giants with a median temperature of 1200 kelvin (927°C), says Decin, but it surely was stunning to see it on WASP-107b, which is extra like 700K (427°C), considered too chilly for big quantities of sulphur dioxide to kind.

One attainable clarification for its presence could also be that extra ultraviolet radiation from the host star, WASP-107, can penetrate the planet on account of its comparatively low density, triggering chemical reactions that kind the compound.

Maybe extra unusually, within the planet’s higher ambiance, Decin and her colleagues discovered clouds product of tiny silicate particles – the matter that types sand. The researchers assume that gaseous silicate deeper within the planet’s ambiance, the place it’s hotter, should rise as much as the place it’s cooler, condense to kind the clouds, after which rain again down, very like what occurs on Earth with water.

“That is the primary time we’ve recognized the composition of exoplanetary clouds,” says Decin.

The findings may enhance fashions of planetary formation and evolution. “We perceive issues primarily based on our personal expertise right here on Earth, however that’s a really restricted view,” she says. “We will actually improve our view on the universe by understanding the dynamics and chemistry of exoplanets.”

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Astronomers have discovered a planet with clouds product of sand : NPR

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