Worlds this small and distant are thought to be too cold and have too little surface gravity to hold onto gases. But the findings suggest that icy, rocky objects in the solar system's outer reaches ar ...

If confirmed, the rock would become just the second world past Neptune in our solar system to host an atmosphere.

Pluto was believed to be the only body beyond Neptune with an atmosphere. Now, a new discovery in our solar system is ...

The finding offers fresh insight into our solar system’s farthest, coldest objects in a region known as the Kuiper Belt.

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

A new tiny ice world has been discovered beyond Pluto surrounded by a thin atmosphere, scientists revealed.

This could change everything. The post Scientists Detect Atmosphere on Planet-Like Object Beyond Pluto appeared first on ...

Pluto's snow-capped mountains look like they belong on Earth, but researchers have discovered that the snowy tops of these features are actually made of methane frost. Pluto's snow-capped mountains ...

We now know Pluto much better, thanks to NASA's New Horizons mission, leaving CNET's Eric Mack to wonder how the former planet compares to our home rock. Eric Mack has been a CNET contributor since ...

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