NASA published its most detailed image yet, taken one day before the flyby. Even better images are still to come.
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.
NASA released a new video simulating a fly by of Ceres, based on images taken by its Dawn spacecraft.
Astrophysicists cite orbit patterns, but some critics are not yet ready to believe.
Which discoveries changed the game in 2014?