New high-contrast images from SPHERE show a stunning variety of debris disks shaped by collisions of tiny planet-building ...

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 ...

Astronomers have discovered fresh evidence suggesting the possible existence of an unseen planet in the far reaches of our solar system. The study, published in the Monthly Notices of the Royal ...

Did you know Solar Smash has hidden planets? Watch as I unlock and destroy Frosty the Snowman, Ghost World, Donut Earth, and more in this chaotic adventure! The world's tallest teenager becomes the ...

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 ...