Pluto's demoted status as a dwarf planet turns 20 years old today and isn't even a chink in its armour when it comes to its astrological impact.

Learn how Pluto nearly kept its planet status in a proposed 12-planet Solar System as its demotion marks its 20th anniversary ...

Pluto looms large in the public imagination as the far frontier of the solar system, but the world itself is remarkably small ...

From being named by an 11-year-old girl over breakfast with grandpa to five moons, bet you didn't know this about Pluto.

COLUMBUS, Ga. (WRBL) – Each year on Feb. 18, a whole day is dedicated to the former planet Pluto. Pluto was once the ninth planet in the solar system, but striped of that title back in 2006. Now ...

Pluto used to be a designated as a planet but was downsized in 2006 to a dwarf planet instead. Here are five facts about the former ninth planet in our solar system. 1 Need more time to study for that ...

A NASA spacecraft's epic Pluto encounter is officially underway. NASA's New Horizons probe today (Jan. 15) began its six-month approach to Pluto, which will culminate with the first-ever close flyby ...