At 4 billion miles away from the sun, Arrokoth is 'too cold to support life as we know it', NASA says. But the new findings ...

Arrokoth is composed of two separate bodies, 3 and 9 miles across. In the distant past they rotated so slowly about each other that their mutual gravitational attraction caused them to come together ...

The larger moons of Pluto and Earth likely formed through a collisional process with Charon and our moon, respectively, ...

New Horizons is the NASA probe launched to explore the outer ... In January 2019, it flew by a strange object named Arrokoth, which orbits the Sun at an average distance of 44.6 astronomical ...