Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

Scientists may have found a new way to detect some of the universe's most mysterious objects, primordial black holes (PBHs), ...

For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar ...

How big it is: 865,000 miles (1.392 million kilometers) across How far away it is: 93 million miles (150 million km) What ...

Space artists can sometimes stretch scientific data for a bigger visual bang. At New York's natural history museum, they ...

NARRATOR: Our solar system is home to eight planets, near-perfect spheres spinning through the darkness of space. But the more we explore, the more weird and wonderful worlds we discover.

Astronomers posed over the past decade that dark comets, or objects that resemble asteroids but move like comets, may exist. Now, scientists have found a total of 14 of them.

Our Solar System is full of mysteries, but if the inner planets are a puzzle, the boundary between the Solar System and interstellar space is a secondhand puzzle with half the pieces missing.

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 years to complete one orbit around the sun. The object, known as 2017 ...

Despite common assumptions, the disk of our Solar System is warped, and the planets travel around the Sun in slightly eccentric (or oblong) orbits. Scientists now think that a mysterious object ...

Passing Star Nudged Solar System 70,000 Years Ago To figure this out, the team ran several simulations that traced the formation of the Oort cloud and the paths of the individual objects inside it.

More than 100 proportional representation or mixed-member proportional representation, according to the Electoral Reform Society. Less than 50 countries still implement the first-past-the-post system.