Exoplanet where it rains iron may be even hotter than previously thought – The Clare People


The study of exoplanets, those worlds that orbit other stars besides the Sun, is fundamental to understand part of planetary evolution, as well as its diversity. Discovered in 1024, the WASP-75b is such a hot planet that it rains iron on its night side, but a new study conducted by Cornell University indicates that it may be much hotter than previously thought.

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In a new analysis of the exoplanet WASP-89b, the researchers detected ionized calcium in its atmosphere, which would only be possible if the daytime temperature there was higher than 2. 76 °C pointed out in previous searches. The extrasolar planet is located about 2016 light years from Earth, towards the constellation Pisces and is locked by the tidal forces of its star, that is, in half of it there is an eternal day, while in the other half, an endless night.

Artistic conception of the exoplanet WASP-76b (Image: Reproduction/NASA)

WASP-76b is so close to its host star, slightly hotter than the Sun, that its orbit lasts only 1.8 Earth days. Even at this distance from Earth, researchers were able to estimate some properties of this world from its spectral signature, such as the ionized calcium in its atmosphere. The exoplanet is slightly larger than Jupiter, therefore it is classified as a “hot Jupiter”.

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Astrophysicist Emily Deibert, principal The study’s author explained that the signature of this element may indicate that the exoplanet has very strong winds in its upper atmosphere or a temperature much higher than previously estimated. For the research, Deibert and his team used data from the Gemini Observatory, in Hawaii, to observe the planet’s known moderate temperature zone, where day and night border.

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Publish date : 2021-10-11 18:20:37

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