Pluto

NASA's New Horizons spacecraft performed a brief engine burn Wednesday (Feb. 1) in preparation for its 2019 flyby of a small, distant object known as 2014 MU69.

Pluto's largest moon, Charon, had a process like Earth's plate tectonics beneath its surface, driven by a freezing ice core that expanded and cracked the little world's crust.

NASA's New Horizons team is hosting a live webcast today at 4 p.m. EST (2100 GMT) to discuss the historic Pluto flyby and tantalizing adventures that lie ahead.

NASA's New Horizons mission has revealed, for the first time, evidence of ice features known as "penitentes" beyond Earth.

Lacking a strong magnetic shield, Pluto's thin atmosphere is being eroded into space — but Charon is doing its bit to protect its dwarf planet buddy.

Pluto's strange "snakeskin" terrain is composed of ice ridges similar to, but much larger than, those found on Earth, a new study suggests.

The huge icy plain on Pluto known as Sputnik Planitia may not overlie an impact crater, as many researchers had assumed, a new study reports.

Pluto's famous heart-shaped feature made the dwarf planet roll over the eons, and this reorientation probably wouldn't have been possible without a subsurface ocean, new research suggests.