GoKawiilResearchers trace Venus' lower haze to cosmic dust, not volcanic ash
A team led by planetary scientist Hiroki Karyu at Tohoku University used a microphysical model to explain the yellowish haze in Venus' lower atmosphere, first seen by Venera and Pioneer Venus probes in the 1970s. The study, published in Nature Astronomy, found the haze forms when sulfuric acid reacts with dust particles left behind by meteorites burning up in the atmosphere, ruling out volcanic ash or surface dust as the source.
GoKawiil's interpretation of the reporting above, not reported fact.
The finding resolves a decades-old puzzle about Venus' atmosphere and suggests cosmic dust plays a broader role in shaping the planet's clouds than previously assumed, since Karyu's team says these particles help seed cloud formation elsewhere in the main cloud deck. It also narrows the case against volcanic activity as the explanation, even as other research indicates Venus remains more volcanically active than once believed.
- Venus' lower haze, first detected in the 1970s, has been traced to cosmic dust from meteorites interacting with sulfuric acid.
- A microphysical model by Tohoku University's Hiroki Karyu ruled out volcanic ash and surface dust as sources of the haze.
- The cosmic dust particles are described as efficient condensation nuclei that can promote cloud formation across Venus' atmosphere.
Celestron NexStar 130SLT Telescope — If Venus's hidden secrets have you looking skyward, this telescope lets you observe the planet yourself as it shines brightly in the dawn or dusk sky. Its computerized mount makes locating Venus and other planets easy, turning curiosity about cosmic dust and haze into a hands-on stargazing adventure.
See Celestron NexStar 130SLT Telescope on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: arstechnica.com, 2026-10-01
Published there as: “Venus' mysterious haze is actually cosmic dust”
Read the original report → The summary and analysis above are GoKawiil's own, written from reporting by the source above. Facts and quotes belong to the original publisher.