Billions of years ago, in the frozen edges of the solar system, a violent impact shaped one of space’s oddest pairs. Instead ...

The International Astronomical Union, which reclassified Pluto as a dwarf planet in 2006, is the arbiter of such ...

Stars that pass close to the solar system could pull planets out of alignment, sending them hurtling into the sun or out into ...

Instead of a typical planet-moon setup, Pluto and Charon became a binary system. They circle a shared point in space, locked in a delicate, endless orbit. Their strange gravitational dance has ...

Pluto, our petite power planet of primordial urges, transformation through trauma, ID energy and the subconscious mind, is ...

From gravel-size meteoroids to mountain-size asteroids and even visitors from other star systems, space is packed with ...

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why Pluto isn't a planet.

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

in its orbit around the sun, essentially laps a planet. While Mercury retrograde is the best-known and most maligned of retrogrades, all planets, including the diminutive Pluto, get down with a ...

Researchers say they found a curious dot on infrared images taken 23 years apart that seems to be moving in a manner ...

But then scientists at the International Astronomical Union decided Pluto didn’t quite make the cut, it lacked the gravitational muscle to clear its orbit. Ouch. Now officially labeled a ...