Triton is a moon of Neptune, discovered in 1846 by William Lassell. It is the largest of Neptune's moons and has a retrograde orbit, meaning it orbits in the opposite direction of Neptune's rotation. The crossword solutions for Triton are NEWT, which stands for Neptunian satellite with an irregular shape, and EFT, which stands for Extremely Faint Telescope, a telescope used to observe faint objects in the night sky.