Over short time scales, the solar system is a beautifully predictable dance, with each planet behaving in a ways that astronomers can calculate — but over long enough periods, it's not such an ...

Travel through time to witness some of the most remarkable episodes in our solar system's history, uncovering its ancient ...

New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

Astronomers using ALMA have discovered that planet-forming discs are not flat and serene but subtly warped, reshaping our ...

Living up to its name, Mercury is the fastest planet in the solar system, speeding along at about 29 miles per second and ...

Planets in retrograde tend to get a bad reputation, and while it’s true that they can cause mishaps, they’re also important ...

Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the discovery of Pluto in the 1930s. Labelled as planet X, prominent ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond Neptune, it orbits the sun every 25,000 years.

The textbook picture of how planets form—serene, flat disks of cosmic dust—has just received a significant cosmic twist.