A modern dynamo at Triton as a consequence of its capture by Neptune

Nature Astronomy, Published online: 01 June 2026; doi:10.1038/s41550-026-02868-9 Triton, Neptune’s largest moon, is presumed to be a trans-Neptunian object that was later captured by the ice giant. Thermal evolution modelling shows that the capture may have provided energy to generate a magnetic field, which could affect attempts to search for a subsurface ocean.