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

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 ...

By Will Dunham WASHINGTON, May 4 (Reuters) - In the far reaches of our solar system - beyond the outermost planet Neptune - ...

A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...

In this video, we explore the consequences of replacing the Sun with extreme celestial objects. Simulations illustrate the effects on Earth if it were substituted with: - White Dwarf Star - Neutron ...

A rare observation opportunity revealed the presence of a thin atmosphere around a small object beyond Pluto.

Astronomers using radio telescope observations to get an inside look at an interstellar comet have gleaned new insights into ...

In the far reaches of our solar system — beyond the outermost planet Neptune — resides a host of icy and desolate celestial ...

Two workers monitoring the moon have to figure out a plan to retrieve the stolen satellite in moonwatchers at Lazy Susan.

Previously Pluto was the only such body thought to have supported an atmosphere, due to its stronger surface gravity.

Researchers discovered evidence of an unexpected thin atmosphere around a small trans-Neptunian object, 2002 XV93. This is ...