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In 1978, astronomers considered Pluto as the solar system’s ninth planet. Its great distance from Earth—on average more than three…

NASA’s New Horizons spacecraft made history by returning the first close-up images of Pluto and its moons. Now, through a…

Five years ago today, NASA’s New Horizons spacecraft made history. After a voyage of nearly 10 years and more than…

NASA JPL Software Engineer Melissa Soriano describes the third potential target for Scientist for a Day contestants: Pluto's moon Charon.

NASA’s New Horizons Team Unravels the Many Mysteries of Ultima Thule The farthest object ever explored is slowly revealing its…

An evocative new image sequence from NASA’s New Horizons spacecraft offers a departing view of the Kuiper Belt object (KBO)…