The planet is believed to be 5,000 times the mass of Pluto.
Just three months after the historic flyby, the New Horizons team has a paper coming out in the journal "Science."
Program scientist Curt Niebur explains new data from NASA’s New Horizons mission.
NASA has released an image taken by the New Horizons spacecraft just 15 minutes after its Pluto flyby.
Continuing a long tradition of space program conspiracy theories, ‘Pluto Truthers’ claim NASA is faking it.
NASA is set to make history shortly after 7:30 a.m. on Tuesday when the New Horizons spacecraft zooms past Pluto.
From launch to the scheduled flyby on July 14, New Horizons has sent back images of Jupiter and its moon Io, Neptune, and now Pluto and its moon Charon.