There is some evidence of lightning occurring on Venus.
Notes on verification
Multiple independent missions (Venera, Pioneer Venus, Venus Express) reported signals consistent with lightning, though other missions (Cassini, Akatsuki) failed to detect it, and the scientific community remains divided. The claim is carefully hedged as 'some evidence,' which matches the mixed corroborating record well. [tier=gold indep_score=1.0 clusters=4 claim_tier=notable]
Sources
- Ashen light (wikipedia)
- https://www.nature.com/articles/279614a0 (corroboration)
- https://science.nasa.gov/missions/cassini/cassini-scientists-see-no-sign-of-lightning-on-venus/ (corroboration)
- https://progearthplanetsci.springeropen.com/articles/10.1186/s40645-018-0181-x (corroboration)
- https://www.science.org/content/article/signs-lightning-venus (corroboration)