Earth and its neighbors orbit the sun on a relatively flat plane. But what's below this plane, and is anythign below the ...

Scientists believe our solar system may be hiding a secret world — and it’s not the famous Planet X :eyes: A new study ...

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...

The origin of super-Earths and sub-Neptunes has been revealed in a system of four young planets that are dramatically losing ...

Not much, unless we're talking about spacecraft. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. For the last month and change, you might've seen ...

Planet Y is the latest in a series of hypothetical solar system planets that scientists have proposed in recent years, all with slightly different characteristics but collectively believed to be ...