That incredible distance, combined with a 25,000-year orbit around the Sun, makes this trans-Neptunian object one of the most extreme and mysterious worlds ever found in our solar system. 2017 ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

At the edge of our solar system, a host of large, icy bodies make up the Oort cloud, which appears to sport two spiral arms ...

A new member of the solar system has been detected, the second-largest of its kind, suggesting there may be more like it ...

Scientists' hunt for a mysterious planet at the edge of our solar system might have turned up results. A US-trio appears to ...

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

According to astronomers, the last time this planet came close to the Sun was in 1930. In the same year, Pluto was discovered ...

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

This Collection brings together original research articles related to our solar system, covering not only planetary science, studies of the Kuiper Belt and the Oort cloud, and solar physics but ...

The Oort cloud is a shell of icy objects that forms the very outskirts of our Solar System. Recently, a group of researchers discovered that the inner portion of the Oort cloud likely has spiral ...

The Oort Cloud is the name given to a theorized group of potentially trillions of icy objects on the edge of our solar system. But while it has been accepted as a theory for over 70 years ...

Researchers used a supercomputer to model the structure of the Oort cloud based on the trajectories of comets as well as the gravitational forces within and beyond our solar system. They ...