It took over nine years for New Horizons to reach Pluto after blasting off atop an Atlas 5 rocket on Jan. 19, 2006. After ...

A stunning photo taken in Somerset has showed every single planet in the solar system at the same time during a rare alignment that won't happen again until 2040.

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as number nine in 2006.

Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have discovered a new planet in our solar system.

NASA's New Horizons spacecraft captured this high-resolution enhanced color view of Pluto on July 14, 2015. The image combines blue, red and infrared images taken by the Ralph/Multispectral Visual ...

Pluto, discovered in 1930, was once considered the ninth planet in our solar system. In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet because it doesn't meet all ...

The planet that was reclassified: Pluto Pluto was discovered in 1930 and was the solar system’s ninth planet, but in 2006 the planet was reclassified to a dwarf planet.

Get ready to look up at the Iowa sky because there will be a rare planet parade in the night sky to end February.

After its discovery in 1930, Pluto was declared the ninth planet in our solar system and quickly garnered attention not typically afforded to its galactic peers.

Pluto is 100 miles smaller than the smallest planet but is not a major planet. Here's which planet in our solar system takes the title instead.

It was one of the most ambitious missions for NASA since the turn of the century, with photos reshaping what scientists know ...