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

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

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

NASA engineers have revived old thrusters on Voyager 1 to prevent a clog from endangering the mission during a planned ...

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

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

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.

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 ...

Caltech/R. Hurt (IPAC) The International Astronomical Union downgraded Pluto's classification to a dwarf planet in 2006, mainly because other objects might cross its orbit. Pluto was previously ...