A 6-planet alignment or parade will form an arc in the early night sky, peaking in it's visibility January 17th and 18th. We ...

The concept of Planet X, or Planet Nine, has captivated astronomers for decades. This hypothetical planet, theorized to be ...

Pluto likely acquired large moon Charon in a “kiss and capture” collision billions of years ago. It may have created a ...

Since New Horizons' close encounter with Pluto 10 years ago, experts have come to think of the dwarf planet as much more ...

There are eight official planets (sorry, Pluto) in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and ...

The newcomer replacing Pluto presently goes by “Planet Nine.” If and when it finally shows up, it will get the honor of a ...

Researchers accounted for the previously overlooked structures of the dwarf planet and moon in computer simulations of a ...

Pluto's big moon Charon may have a different origin story than scientists suspected. New research suggests the two bodies ...

Pluto and Charon may have formed through a “kiss and capture” mechanism, with the two icy bodies colliding and becoming ...

Eris was discovered. It was considered the largest known dwarf planet in the solar system until a year later when Pluto was ...

Pluto and its largest moon Charon could have come together via a 10-hour “kiss-and-capture” encounter after a grazing ...