Pluto may have been demoted to non-planet status, but it still commands a court of five moons, as is fitting for the king of ...

Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

Pluto has long been one of the most debated celestial bodies in our solar system. Once classified as the ninth planet, it was ...

Eight years after being reduced to a "dwarf planet" by the International Astronomical Union in 2006, our far distant cousin is finally getting some real push to be upgraded back to the ninth "planet" ...

Pluto and its moon Charon may have been briefly locked together in a cosmic “kiss”, before the dwarf planet released the smaller body and recaptured it in its orbit. Charon is the largest of Pluto’s ...

A full view of Pluto's crescent, captured by NASA's New Horizons team on July 14, 2015, as the spacecraft looked back at Pluto toward the sun. (NASA) (CN) — The question of how Pluto captured its moon ...

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new dwarf planet. It's called 2017 OF 201, a rock that appears to be some 700 ...

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For billions of years, Pluto and its largest moon Charon have been facing each other in a mutual tidal lock. Since it’s about half the size of Pluto, the moon and its planet are sometimes referred to ...

Astronomers have discovered methane gas on the distant dwarf planet Makemake using the James Webb Space Telescope (JWST) for the first time. This finding overturns the previous belief that Makemake is ...