A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

New research suggests that our entire solar system is vulnerable to being thrown into chaos by a distant star.

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

Our solar system’s origin story spans billions of years and involves clouds of gas, cosmic collisions, and planetary ...

A new astronomical study suggests that Earth could one day be ejected from the solar system, not by the aging of the Sun, but ...

Scientists have discovered a colossal object approximately 435 miles wide in the frigid outer reaches of our solar system, ...

Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million ...

But this assumes that nothing affects the Solar System in the meantime, and that is not a certainty. As we travel around the ...

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

A new telescope project called the Next-Generation Very Large Array will revolutionize radio astronomy if it gets the funding ...

Jupiter, roughly 562 million miles from Earth today, has nearly 100 moons. But Batygin and his collaborator Fred Adams' ...