Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

There's even evidence that this three-body gravitational interaction has produced a binary capture, with Neptunian moon Triton. Triton orbits Neptune in the opposite direction from the rest of ...

which makes it the smallest of Uranus’ moons—and it takes 680 days to orbit the planet. The other two Neptunian moons come in two flavors—bright and faint. The bright one, currently known as ...

If you look up on a clear night, the brightest and largest object in the sky will probably be the moon. And unless you have a decent telescope, it is the only natural satellite you can see with ...