Triton
Triton is the largest of Neptune's 13 moons and is unique due to its retrograde orbit, meaning it orbits Neptune in the opposite direction of the planet's rotation. Scientists believe Triton was a Kuiper Belt Object captured by Neptune's gravity millions of years ago.
Source: science.nasa.gov
APODs including "Triton"
Fishing for the Moon
23/08/2025
How big is planet Earth's Moon? Compared to other moons of the Solar System, it's number 5 on the largest to smallest ranked list, following Jupiter's moon Ganymede, Saturn's moon Titan, and Jovian moons Callisto and Io. Continuing the list, the Moon comes before Jupiter's Europa and Neptune's Triton. It's also larger than dwarf planets Pluto and Eris. With a diameter of 3,475 kilometers the Moon is about 1/4 the size of Earth though, and that does make it the largest moon when compared to the size of its parent Solar System planet. Of course in this serene, twilight sea and skyscape, August's rising Full Moon still appears small enough to be caught in the nets of an ancient fishing rig. The telephoto snapshot was taken along the Italian Costa dei Trabocchi, on the Adriatic Sea.