New images from the New Horizons probe approaching Pluto indicate it might have a polar cap of nitrogen ice, NASA says. The observation came in a series of pixilated images taken April 12-19 as ...

NASA’s New Horizons probe has picked up a bright spot on Pluto's surface that may indicate a polar ice cap, as it zooms towards its close flyby this summer. The latest images from the almost ...

The red cap on Pluto's moon Charon results when ultraviolet light and the solar wind interact with hydrocarbons and turn them into a soup of organic compounds called tholins.

New images of Pluto suggest the dwarf planet has a polar ice cap. That cap, and other features, were seen in images taken by NASA’s New Horizons spacecraft that for the first time offer better ...

NASA’s Pluto-bound New Horizons spacecraft has spotted surface features on the icy world, including a possible polar cap, images released on Wednesday show.