Unlike how scientists believe Earth's moon formed billions of years ago, Pluto and its biggest moon, Charon, didn't have a messy breakup. New computer simulations show the primitive dwarf planet ...

"It's half Pluto's size and 12% of its mass, which makes it much more similar to the Earth's moon than any other moon in the ...

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

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto turns out to have as much complexity as Mars or Earth, so much so that I ...

The Pluto TV April 2025 lineup includes Earth Month content, a lineup of horror favorites for April Ghouls, new channels, ...