Add another moon to the New Horizons photo gallery: the spacecraft’s Long Range Reconnaissance Imager detected Triton, the largest of Neptune’s 13 known moons, during the annual spacecraft checkout ...

Triton was discovered in 1846 by the British astronomer William Lassell, but much about Neptune’s largest moon still remains a mystery. A flyby by NASA's Voyager 2 spacecraft in 1989 offered a quick ...

Triton is one of the strangest moons in the solar system. It orbits Neptune in the opposite direction of the planet’s rotation, suggesting it was once a wandering object captured from the distant ...

Neptune’s largest moon, Triton, and the dwarf planet Pluto may have shared a common origin before being separated in the early solar system, an analysis of their composition suggests. Triton and Pluto ...

Add Yahoo as a preferred source to see more of our stories on Google. “The three newly discovered moons are the faintest ever found around these two ice giant planets using ground-based telescopes,” ...