What Is the Kuiper Belt? The Icy Region Beyond Neptune
The Kuiper Belt is a broad, cold region beyond Neptune where millions of icy bodies orbit the Sun. Pluto is the best-known member, but it is only one of many…
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Pluto
New Horizons Finds Signs of Liquid Nitrogen Rising Through Pluto’s Ice
Pluto’s famous heart is not a smooth, frozen decoration. A new analysis of images from NASA’s New Horizons flyby suggests that liquid nitrogen may occasionally rise through cracks in the…
Pluto Up Close: What New Horizons’ Images Revealed
What did NASA’s New Horizons spacecraft reveal at Pluto? Before the 2015 flyby, Pluto was a distant world seen mostly as a changing point of light. New Horizons showed a…