Voyager 2 nails Neptune flyby with golf-putt precision

After a 12-year, 7.13-billion-km journey, Voyager 2 arrived at Neptune within 100 km of its planned point—a margin NASA likens to a golf-putt 3,630 km long—thanks to gravity assists and precise tracking; the flyby passed 29,240 km from Neptune’s centre and about 4,950 km above its north pole, and revealed six new moons, four rings, and Triton’s geysers, making it the only close Neptune visit to date and fueling discussion of future ice-giant missions.