The debate over Pluto’s planetary status has been ongoing since its reclassification as a “dwarf planet” in 2006 by the ...

Pluto, once considered the ninth planet of our solar system, has been a topic of intrigue since its reclassification as a ...

Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists — including hints about how the solar system formed.

With a diameter of 1,440 miles, Pluto is farthest from the sun. While major planets make roughly circular orbits, Pluto ...

With such questions lingering, Howett and her colleagues designed a follow-up mission in hopes of finally solving some of Pluto's mysteries. Such a mission, sent to investigate the outskirts of the ...

A kindergartener in 2005 and a kindergartener in 2006 would have learned very different facts about the number of planets in the solar system. 2006, of course, was the year Pluto was reclassified ...

Pluto's largest moon, Charon. (Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute) Labroots recently explored Saturn’s sponge-like moon, Hyperion, with its ...