That, plus Pluto’s small size—smaller than our moon—suggested that the world did not accrete in its current orbit from the primordial gas and dust that gave rise to the sun and the planets ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto turns out to have as much complexity as Mars or Earth, so much so that I ...

Pluto TV offers 250+ live-streaming channels, covering news, sports, reality TV, and more. Favorite channels include Flicks of Fury, Star Trek, Stories by AMC, and Britbox Mysteries. Classic TV ...

In 2006, after New Horizons was launched but before it could complete its nine-plus year journey, Pluto suffered the indignity of being demoted from planet to dwarf planet by the International ...

(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague?