Saturn’s Rings Could Vanish in 100 Million Years, but the Timeline Is Debated

NASA-led studies indicate Saturn’s rings could vanish in a geologically brief window—ring rain would drain the rings in under 100 million years (potentially up to ~300 million if counted without the equatorial infall); the timeline depends on solar UV charging and Saturn’s orbit, with Cassini data lowering the upper bound. The rings’ age is disputed: some work suggests they’re only 10–100 million years old, while others argue they could be much older. No funded mission is planned to resolve the question, so future constraints will come from Cassini data reanalysis and ongoing observations and modeling.