It’s been a crazy week learning about Pluto as the New Horizons spacecraft makes the first-ever close encounter with the dwarf planet. Join us as we live-blog the very first science results as the ...

New research suggests Pluto may have had a “kiss” with its largest moon billions of years ago in a harmless collision. The report, published in “Nature Geoscience,” describes how the minuscule dwarf ...

Discover the incredible story of NASA's New Horizons mission, from its 2006 launch aboard an Atlas V rocket to its historic ...

Planetary scientist Kelsi Singer was an undergraduate in 2006 when a spunky spacecraft launched with an ambitious goal: to fly by Pluto. It would take nearly a decade for the New Horizons probe to ...

A spacecraft named New Horizons is about to embark on an extraordinary 10-year voyage to Pluto, the frozen planet nearly 4 billion miles away that orbits on the very outer edge of the solar system ...

Pluto has been given a new name to reflect its new status as a dwarf planet. On Sept. 7, the former 9th planet was assigned the asteroid number 134340 by the Minor Planet Center, the official ...

If you're my age, you probably remember learning that Pluto was the ninth planet in the solar system when we were kids, as 75 years of generations had before us. We learned that My Very Excellent ...