Triton, or Neptune I, is the largest moon of the planet Neptune.
It is the seventh-largest moon in the Solar System.
Triton is slightly smaller than Earth's Moon.
Triton has a complicated geological history, and it is thought to have a comparatively young surface compared to the age of the Solar System itself.

It was discovered by the British astronomer William Lassell on 10 October 1846, just 17 days after Neptune itself was discovered by the German astronomer Johann Gottfried Galle and Heinrich Louis d'Arrest.

Triton is believed to be a captured Kuiper Belt object, and is the coldest-known body in the Solar System.
The surface temperature of Triton was recorded by Voyager 2 as -235 °C (-391 °F).
Triton has its own magnetic field and has a faint trace of an atmosphere.
Triton, or Neptune I, is the largest moon of the planet Neptune. It is the seventh-largest moon in the Solar System. Triton is slightly smaller than Earth's Moon. Triton has a complicated geological history, and it is thought to have a comparatively young surface compared to the age of the Solar System itself.
It was discovered by the British astronomer William Lassell on 10 October 1846, just 17 days after Neptune itself was discovered by the German astronomer Johann Gottfried Galle and Heinrich Louis d'Arrest.
Triton is believed to be a captured Kuiper Belt object, and is the coldest-known body in the Solar System. The surface temperature of Triton was recorded by Voyager 2 as -235 °C (-391 °F). Triton has its own magnetic field and has a faint trace of an atmosphere.
Triton (moon)