The object’s aphelion—the farthest point on the orbit from the sun—is more than 1,600 times that of Earth’s orbit,” Institute ...

Astronomers have discovered a mysterious dwarf planet, 2017 OF201, far beyond Pluto. This discovery challenges existing ...

Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a highly ...

The International Astronomical Union’s Minor Planet Center, which catalogs new moons and other small bodies in the solar ...

There’s a new object in the distant reaches of our solar system, and it might just offer clues to a long-standing cosmic ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...

Astronomers may have found a new candidate for the role of the ninth planet in the solar system.

Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

Up until a few years ago, astronomers could measure only the mass and the radius of planets outside the Solar System. Today, telescopes like ESO's VLT already allow scientists to map the weather ...

To put that in perspective, this new planet at the outer rim of the solar system would be almost 20 ... aren’t enough to map Planet Nine’s full orbit or confirm it’s really a planet.

But there’s still another way to virtually explore most of the solar system a la Google Maps ... the old way of accessing planets via Google Sky Maps has changed. Google Sky, Google Mars ...