Image: Frozen carbon monoxide in Pluto's 'heart'

Peering closely at the "heart of Pluto," in the western half of what mission scientists have informally named Tombaugh Regio  (Tombaugh Region), New Horizons' Ralph instrument revealed evidence of carbon monoxide ice.  

New horizons brings Pluto's mysterious moons into play

Drifting along at what for decades was regarded as the outer boundary of our solar system, icy Pluto is far from alone. The dwarf planet has moons – at least five of them – which are all fascinating little worlds in their ...

Image: Views of Pluto through the years

This animation combines various observations of Pluto over the course of several decades. The first frame is a digital zoom-in on Pluto as it appeared upon its discovery by Clyde Tombaugh in 1930 (image courtesy Lowell Observatory ...

Pluto's close-ups to offer high-resolution views

Pluto's surface has long been a blur to sky watchers on Earth, but a NASA spacecraft on Wednesday should provide the first high-resolution images of the distant dwarf planet after a historic flyby mission.

US spacecraft sending back data for Pluto close-up

Scientists are receiving data that will offer the closest look ever of Pluto later Wednesday, after the unmanned NASA spacecraft whizzed by the distant dwarf planet.

Astrophysicist discusses Pluto flyby findings

NASA's New Horizons spacecraft reached its closest approach to Pluto on Tuesday, swooping to within 7,800 miles of the dwarf planet out beyond Neptune, snapping pictures and gathering data.

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