Just when you thought it was safe to go to Pluto, scientists have declared that it's not a planet. These are the same scientists who maintain that humans come from monkeys. Pluto is 4 billion ...

A so-called 10th planet discovered last year is bigger than Pluto, scientists say they have confirmed.

The only larger dwarf planets in our solar system are Pluto, which has a diameter of 1475 miles, and Eris, which has a diameter of 1445 miles. 2007 OR10 is the third biggest dwarf planet in our ...

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

Astronomers believe a planetary body collided with Pluto early in its history to create a gigantic heart-shaped feature on the dwarf planet.

Proud mum Bambi gave birth to the adorable litter earlier this week at the award-winning farm in Old Amersham, Buckinghamshire. The piglets' pint-sized dad is Pluto, a 38cm tall Juliana boar who’s ...

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.

The size of the Solar System and the Universe is truly beyond our comprehension. When we think of the vastness of space, we ...

Kiladze Caldera, formerly called Kiladze crater, may be a supervolcano that erupted fairly recently, spewing ice across the surface of Pluto.

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.

Its diameter of about 700 miles (1,110 km) is about a third that of Earth’s moon and half that of the dwarf planet Pluto.