When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

"We were definitely surprised by the 'kiss' part of kiss-and-capture. There hasn't really been a kind of impact before where the two bodies only temporarily merge before re-separating!" ...

This once-in-a-generation shift is a pivotal power play in a saga that will unfold in the years and decades to come.

Whereas a moon usually orbits a planet, both Pluto and Charon orbit a point in space between them — their common center of mass. The other four moons in the system — Styx, Nix, Kerberos and ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

It was previously thought that Charon formed in the wake of a massive collision billions of years ago, much like how Earth's moon was born after our planet ... into space. "Pluto and Charon ...

Scientists have discovered a new type of planetary collision called “kiss-and-capture,” where Pluto and proto-Charon briefly ...

A four-year-old boy's curiosity about planets has inspired him to write his first children's book. Viaan Mundeja-Gupta, who ...

The government space agency has vocally promoted ... Charon is large in size relative to Pluto, and is locked in a tight orbit with the dwarf planet. A new simulation suggests how it ended up ...