Venus's Yellow Haze Is Meteor Dust With a Sulfuric Acid Coat

Shooting stars don't only decorate a sky. They burn up in an atmosphere and leave fine cosmic dust behind, and on Venus, per Ars Technica's account, that dust accumulates. When sulfuric acid interacts with those particles, it leaves a haze. So a hazy layer around the planet traces back to meteoritic debris rather than to Venus's own chemistry alone. The neat part is the recycling: infalling rock becomes atmospheric scenery, and an atmosphere stops looking like a closed system.