Mercury’s capture paradox: BepiColombo’s gravity-assisted march to orbit

Mercury’s strong solar gravity makes orbital capture energy-intensive; a direct trip to Mercury would require enormous propellant, so BepiColombo used an eight-year path of gravity assists (nine flybys across Earth, Venus and Mercury) plus solar-electric propulsion to gradually shed energy and enable Mercury orbit insertion in November 2026. After arrival, two science orbiters will study Mercury’s environment, showing that stopping in the inner Solar System can be harder than simply getting there.