Discovered in 1846, Triton is the largest moon of Neptune - but it’s unlike any other. Scientists believe it was once a free-floating planet before Neptune’s gravity captured it.

It took this image of Neptune and its moon Triton, one of 77 composite photographs that appeared in our 2016 exhibition, Otherworlds: Visions of our Solar System, before speeding towards interstellar ...

Using Webb’s near-infrared spectrograph, astronomers have captured new images of Neptune that finally reveal the planet’s ...

Ganymede, Jupiter's largest moon and the solar system's largest, is bigger than Mercury and the dwarf planet Pluto, with a diameter of 5,268 kilometers.

(if going by patent filings) of the telescope to finally see Neptune's auroras, and it's thanks to NASA's James Webb Space ...