NASA's deep space probe 'New Horizons' has discovered five big things about the little-understood Pluto. What are they?

A gradual dimming and brightening when a star passed behind it suggested the mini-Pluto was wrapped in a thin layer of air.

Two decades ago, the International Astronomical Union—which defines and names celestial bodies—redefined the criteria for ...

Astronomers in Japan have found evidence suggesting a possible thin atmosphere around a distant icy object beyond Pluto, ...

In a significant breakthrough, astronomers have detected a Pluto-like planet situated far beyond the known boundaries of the solar system. Identified as 2017 OF201, the icy celestial body may ...

Pakistan, May 5 -- A tiny, little-known world beyond Pluto appears to have an atmosphere, Japanese astronomers said on Monday ...

Add Yahoo as a preferred source to see more of our stories on Google. For decades, astronomers have tried to determine how Pluto acquired its unusually large moon Charon, which is about half the size ...

In the outer reaches of our Solar System, 5.7 billion kilometres from the Sun, lies the dwarf planet Pluto. Smaller than Australia, it is an icy world of mountains, glaciers and craters where the ...

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 ...