An accidental discovery in an astronomy show offers researchers a new clue about the mysterious Oort Cloud, a large expanse ...

A massive comet — so large that scientists had previously mistaken it for a dwarf planet — is hurtling through space toward our solar system and is expected to arrive in about 10 years ...

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

To their surprise, 2I/Borisov contained a large amount of carbon monoxide ... more interstellar asteroids that have been hanging around our solar system for billions of years.

There may be more than meets the eye with The Kuiper Belt, a ring comprising thousands of large, icy objects and dwarf planets that encircle our solar system. A yet-to-be-published study ...

Scientists have released the first ever picture of a solar system like our ... Southern Observatory's Very Large Telescope. It shows the planetary system known as TYC 8998-760-1, which is about ...

An object on the outer edges of the solar system may have a large moon orbiting it at an unusually close distance. The find could help explain how such binary objects evolved. José-Luis Ortiz at ...

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 ...