Similarities Between Jupiter and Earth Lightning Revealed

Data from NASA's Juno spacecraft revealed that lightning on Jupiter develops in a strikingly similar step-by-step pattern to lightning on Earth, with pulses occurring at comparable rates despite the planets' vast differences in size, distance from the sun, and atmospheric composition. The findings suggest that the underlying physics of electrical discharge in planetary atmospheres may follow universal principles independent of specific environmental conditions.

Jupiter's lightning forms in clouds likely containing an ammonia-water mixture, occurs most frequently near the gas giant's poles rather than its equator, and may carry more than 100 times the energy of a typical Earth bolt. Scientists believe the discovery helps refine models of planetary atmospheric dynamics and deepens understanding of the chemical processes lightning drives on worlds throughout the solar system.

Juno is still answering this study's question. A paper published March 20, 2026 in AGU Advances counted 613 lightning pulses across 12 passes, some at least 100 times more powerful than an Earth bolt, and the spacecraft was still delivering Io heat maps on July 22, 2026. The catch is money. Its extended mission ended in September 2025, and NASA planetary science chief Louise Prockter told a National Academies committee that extended missions cost about $260 million a year, roughly two Discovery missions over a decade, Ars Technica reported. Scientific American wrote its farewell in August 2025. Watch NASA's operating plan to Congress and the fiscal 2027 budget that begins October 1, 2026, which proposes scrapping 54 science missions.