But the story doesn’t stop there. New Horizons made its closest flyby of Pluto on July 14 and released an Instagram-exclusive close-up of the dwarf planet’s surface.

Arizona has declared Pluto as its “official state planet” — despite it being relegated to “dwarf planet” status nearly two decades ago.

Top international astronomers voted Thursday to strip Pluto's planetary status that it has held since its discovery in 1930. The celestial object is now redefined as a "dwarf planet," leaving just ...

That dog, of course, was Pluto. Now, some 31,714 days after Walt Disney first laid eyes on the now-dwarf planet (and 31,192 days after the rest of humanity found out), we finally see what he saw ...

Pluto's classification changed from planet to dwarf planet in 2006. This reclassification helps scientists better organize and understand solar system objects. The decision was controversial, with ...

Now Pluto, the solar system’s consummate cling-on, has suffered its worst humiliation: It is not even a planet anymore. After a tumultuous week of clashing over the essence of the cosmos, leading ...

Thus, in late 2006 the IAU gave a present to Pluto — a reduced importance and the designation 134340 Pluto, designating it a dwarf planet (with an asteroidal nomenclature). The world’s press ...

The dwarf planet was initially believed to be at least the size of Earth, but astronomers now know that it's about 1,455 miles across — less than 20 percent as big as our planet. And Pluto is ...

The spectacular photos, which were captured by NASA's New Horizons spacecraft during its historic Pluto flyby on July 14, show close-up views of the dwarf planet's towering water-ice mountains and ...

For one reason or another, some people are still upset about Pluto's demotion from planet to dwarf planet. This demotion, by the way, occurred all the way back in 2006. So, what does famed ...