FINALLY, a plausible explanation for how Neptune captured its errant moon Triton. It seems that Triton was wandering through space locked in the gravitational embrace of a companion when the pair happened to pass by Neptune. The gravity of the giant planet extricated Triton from its partner, flinging one into deep space and keeping the other as a moon.
About 40 per cent larger than Pluto, Triton moves through its tilted orbit in the opposite direction to Neptune’s rotation. This is the hallmark of a captured body, rather than one formed in situ, but astronomers have never been able to…
