New study using Parker Solar Probe data suggests lightning is rare in Venus' atmosphere, if it happens at all.
During 2021 flyby, Parker Solar Probe picked up electromagnetic whistler waves in Venus' atmosphere.
On Earth, lightning strikes can produce whistler waves that propagate upward through the atmosphere.
Venus whistlers were moving downward, not expected behavior for lightning-generated waves.
Parker data suggests magnetic reconnection distrubances created the Venus whistler waves.
Upcoming Venus flybys by Parker Solar Probe can provide more conclusive lightning evidence.
Though not a Venus mission, Parker has already expanded knowledge of the planet's atmosphere.