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Venus' mysterious haze is actually cosmic dust - Ars Technica (opens in a new tab)

arstechnica.com · 2026-10-01

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Claim 1 of 5Not checkedThe yellowish lower haze in Venus’s atmosphere, first seen by the Venera and Pioneer Venus probes in the 1970s, had gone unexplained for decades.View evidenceHide evidence

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The source study was found, but this claim couldn't be checked against it.

Claim 2 of 5Not checkedThe haze is an accumulation of particles from meteorites: cosmic dust left behind by burning meteors, which then interact with sulfuric acid in the atmosphere to form the haze.View evidenceHide evidence

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Claim 3 of 5Not checkedPlanetary scientist Hiroki Karyu and his team at Tohoku University used a microphysical model to figure out how the haze formed, and Karyu is quoted saying the continuous influx of cosmic dust is sufficient to sustain the lower haze layer with the particle size distribution observed by the entry probes.View evidenceHide evidence

As statedcontinuous influx of cosmic dust is sufficient

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The source study was found, but this claim couldn't be checked against it.

Claim 4 of 5Not checkedPrevious ideas that volcanic ash or surface dust created the haze are described as ruled out by the researchers.View evidenceHide evidence

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Claim 5 of 5Not checkedThe article says the haze particles of cosmic origin act as efficient condensation nuclei and may promote cloud formation in Venus’s main cloud deck even far from their initial source.View evidenceHide evidence

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A cosmic origin of Venus’ lower haze

Nature Astronomy · 2026

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Papers considered

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Crossref, PubMed, Europe PMC · 17 candidate papers

And 11 more candidates considered.