Add Yahoo as a preferred source to see more of our stories on Google. A hazy ring of gas surrounds a white rocky planet. Pluto's atmosphere appears to be freezing out as the dwarf planet moves ever ...

A groundbreaking mission that explored Pluto and distant solar system objects in unprecedented detail has awakened from its longest sleep ever — and it’s 5.9 billion miles from Earth. NASA’s New ...

A researcher has used advanced models that indicate that the formation of Pluto and Charon may parallel that of the Earth-Moon system. Both systems include a moon that is a large fraction of the size ...