Neptune is the last planet in our Solar System, but it may also be one of the most mysterious worlds we have ever discovered.

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

Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The ...

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

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

A study suggests that the ice giant's largest moon, Triton, made a dramatic entrance to the Neptunian system long ago, kicking Nereid outward and destroying the planet's other original lunar companion ...

The Webb Space Telescope has given us our first glimpse of Neptune glowing with bright auroras, a visually stunning phenomenon that has long evaded scientists studying the ice giant. Using Webb’s near ...

New research by a University of Victoria PhD student is challenging popular theory about how part of our solar system formed. At the meeting of the American Astronomical Society’s Division of ...

Take the chance in September to get outside and gaze at planets. Neptune is in full opposition this month, and while Saturn's full opposition happened earlier this month, it's still visible if you ...