Researchers have proposed a new theory suggesting that Pluto's moon Charon originated from a unique "kiss and capture" collision billions of years ago.
Previous theories likened Charon's formation to Earth's moon, but did not consider the structural differences of icy, rocky bodies like Pluto and Charon.
In their model, Pluto and Charon briefly collided and formed a snowman-like figure before separating into a binary system.
This discovery could illuminate how moons form and evolve within the solar system, indicating that such collisions may happen across the Kuiper Belt.
Studies suggest that this impact scenario supports the existence of a subsurface ocean beneath Pluto's ice, created due to the heating from the collision.