The Solar System’s top 5 most amazing moons! | Triton: "This is Neptune’s giant moon. It’s the coldest object this side of the Kuiper belt – even colder than Pluto. It also has a retrograde (backwards) orbit, suggesting it was probably once an independent Kuiper belt object which was captured by Neptune. It also has liquid nitrogen geysers, and a thin atmosphere. It even has weather!"
Neptune's largest moon, Triton.
Evolution Explorer）が撮影｜Photograph courtesy NASA/JPL/California Institute of Technology
NASA Viking Lander I, First Color Photo Taken on Mars, 1976 (July 21)
Cat's Eye Nebula 、NGC6543
The Solar System’s top 5 most amazing moons! | Ganymede: "The largest moon in the entire Solar system, and the third of Jupiter’s Gallilean moons. Voyager picked up a weird radar echo from inside Ganymede. The most likely explanation is that it’s also hiding a subsurface ocean of saltwater. It’s also the only moon with a magnetic field – just like Earth!"