Venus' mysterious haze is actually cosmic dust
Scientists have identified the source of Venus' enigmatic "lower haze": the yellowish layer is composed of dust particles originating from meteorites.
Researchers have unraveled a decades-long mystery surrounding Venus' atmosphere: the planet's yellowish "lower haze" is formed from cosmic dust originating from meteorites.
The discovery was made by a team led by planetary scientist Hiroki Karyu at Tohoku University in Japan. Using a microphysical model, the researchers determined that dust particles left behind by meteoroids burning up in Venus' atmosphere interact with sulfuric acid to create the haze.
"The continuous influx of cosmic dust is sufficient to sustain this lower haze layer with the particle size distribution observed by the entry probes," Karyu stated in a study published in Nature Astronomy. "These haze particles of cosmic origin act as efficient condensation nuclei, promoting cloud formation in the main cloud deck even far from their initial source."
The findings provide new insight into the atmospheric dynamics of Venus and the long-term impact of extraterrestrial material on planetary environments.