Pluto — famous for being reclassified as a dwarf planet — might not have a heart of ice after all. In fact, every bit of Pluto was assumed to be frozen over considering its distance from the Sun.

Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

Ever since NASA's New Horizons sent back the first-ever photos of Pluto in 2015, the dwarf planet's mysterious heart-shaped region has puzzled scientists. New research suggests that Sputnik ...

According to Dr. Grundy, Pluto is a planet. "I use the word 'planet' to refer to it, and most of the planetary science ...

The "Star Trek" legend's only son will discuss his memoir at the annual space-themed event.

Pluto, our planet of profound change and ultimate reckoning, has set up shop in Aquarius ... underworld journeys and the dark and dangerous heart that beats below the veneer of civilization ...

The white “heart” feature in the centre appears ... Click on the hand to see why Pluto and its moon have shaken things up. New Horizons' biggest surprise was that Pluto shows signs of still ...