For decades, astronomers thought Neptune’s moon Nereid was probably a captured object from the Kuiper Belt. A new study now ...

Using the Subaru Telescope, astronomers have conducted follow-up observations of a recently discovered exoplanet known as TOI ...

The study marks the first-ever detection of a potential atmosphere around a trans-Neptunian object other than Pluto.

Astronomers have spent years searching for a possible hidden giant planet far beyond Neptune. Unusual orbits among distant ...

They used a dynamic simulator called REBOUND to map Neptune as a series of normal, circular moons. Then they hit that nice, ...

What is Planet Nine, and where is it? The question has fascinated astronomers for years. Scientists believe a massive ...

All of Neptune's clouds have vanished, and scientists think the sun is to blame. The disappearance of the wispy, white strands of frozen methane that usually streak Neptune's azure face has been ...