Dust Storms on a Rogue Planet ⚡ экспресс
VHS 1256B is the most variable known planetary-mass object: its near-infrared flux varies by almost 40%. Recent JWST spectra revealed reddening and silicate features, challenging existing models. Using a general circulation model, it is shown that the atmosphere is dominated by planet-scale dust storms persisting for tens of days, and large patchy clouds spreading with equatorial waves. This weather regime, distinct from the zonal banding of Solar System gas giants, simultaneously explains the observed spectra and key features of rotational light curves: the large amplitude, irregular evolution, wavelength dependence, and the variability trends in color–magnitude diagrams for dusty substellar atmospheres.
Far beyond the Solar System, a world called VHS 1256B wanders—a giant planet without a star. For a long time, astronomers couldn’t figure out why its brightness jumped by nearly 40% in just a few days. The answer came with the James Webb telescope: it turns out, colossal storms of silicate dust engulf the entire planet. These aren’t isolated clouds, but a continuous veil of scorching sand that either tightly swaddles the globe or tears apart under the force of supersonic winds. Computer simulations showed how the sand ripples in waves from the equator to the poles, causing chaos for weeks. At 1000°C, the dust doesn’t melt but remains solid quartz crystals—a glittering suspension. They also give the planet a reddish tint, visible in color spectra. Now scientists are searching for similar dust veils on billions of other rogue worlds to understand what weather prevails in the eternal cosmic night.
🎯 The dust doesn’t melt at 1000°C because silicates melt above 1700°C—so the sand sparkles like glass beads.
🎬 These storms are like an eternal Arrakis from Dune, only planet-wide and without the giant worms.