A small, icy world orbiting beyond Neptune has no business holding onto an atmosphere. It is too small, too cold, and too far ...

The atmosphere is between 5 million and 10 million times thinner than Earth's atmosphere. A very small body, far from the sun in an icy outer realm of the solar system, has mysteriously grown an ...

Astronomers detected signs of a thin atmosphere around distant object 2002 XV93, surprising scientists who believed it was ...

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

A new tiny ice world has been discovered beyond Pluto surrounded by a thin atmosphere, scientists revealed. The "mini-pluto" is thought to be the solar system's smallest object, but still has a ...

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

Approximately 190 light-years from Earth, two planets circle the star TOI-1130 in a setup astronomers rarely see. One is a ...

Add Yahoo as a preferred source to see more of our stories on Google. For the first time ever, NASA’s James Webb Space Telescope—humanity’s most powerful eye in space—has captured auroras on Neptune ...

Scientists discovered a mini-Neptune with a heavy atmosphere, revealing new clues about how planets migrate through young ...

At the left, an enhanced-color image of Neptune from the NASA/ESA Hubble Space Telescope. At the right, that image is combined with data from the NASA/ESA/CSA James Webb Space Telescope. The cyan ...