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Failed Star Shakes Up a Phosphine Cocktail ⚡ экспресс

Original: "Observation of undepleted phosphine in the atmosphere of a low-temperature brown dwarf"
arXiv:2510.03916 · 2025-10-04 · CC BY 4.0 · ⏱ 1 min · Stellar Exoplanets
The James Webb Space Telescope has reliably detected phosphine for the first time in the atmosphere of a cool brown dwarf — and it turned out to be ten times more than predicted.
Abstract

In the atmospheres of brown dwarfs (failed stars) and giant planets, phosphine was expected, but until now it was barely seen. Using the JWST telescope, scientists finally found a lot of phosphine in the dwarf Wolf 1130C: roughly like a spoonful of salt in a swimming pool. This discovery shows that the chemistry there is more complex and more like Jupiter's. Are such surprises hiding in exoplanets too?

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Brown dwarfs — 'failed stars' that couldn't ignite their nuclear furnace. More massive than planets but lighter than stars, they resemble giant atmospheric mixers: their interiors are hot, their upper layers relatively cool, and powerful currents shake this mixture. Using спектрального анализа (breaking light into colors) on телескопе Джеймса Уэбба, scientists detected phosphine in Wolf 1130C. This gas, known from Jupiter, turned out to be ten times more concentrated here than previously seen.

The abundance of phosphine indicates strong convection: from the scorching depths, gas shoots upward at hundreds of meters per second — faster than any Earthly hurricane.

Curiously, on Earth this gas smells like decay, while the cosmic 'cocktail' mixes odorlessly. Now astronomers can use such chemical markers to more clearly distinguish экзопланеты-гиганты from brown dwarfs.

🎯 On Earth, phosphine is a companion of rotting swamps, while in space it's born in the depths and carried up by storms.

Scientists
Christian DopplerD. B. McLaughlinDidier QuelozMichel MayorR. A. RossiterAlbert Einstein
Tags
spectroscopy JWST exoplanet
Laws
Doppler effectgravitational lensingKepler's third lawMaxwell's equationsPlanck's lawPlanck–Einstein relation
Original: arXiv:2510.03916 · CC BY 4.0 · bridge42worlds