Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

An amateur astronomer discovered Pluto 95 years ago today. The former planet will complete an orbit in another 153 years. On February 18, 1930, just two weeks after his 24th birthday, Clyde Tombaugh ...

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 ...

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 ...

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" ...

New research suggests that Pluto may have acquired its most massive moon, Charon, through an ancient grazing impact, which the science team refers to as a “kiss and capture”. The study uses computer ...

Astronomers using the Hubble Space Telescope have uncovered the remains of a frozen, Pluto-like world being devoured by a ...

First, let’s compare the orbital characteristics of Pluto with those of other planets. Pluto has an orbital eccentricity (the degree to which its orbit deviates from a perfect circle) of 0.25, while ...