Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Researchers have found a candidate for the hypothetical Planet Nine, which could be an undiscovered giant planet way out in ...

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

In a distant corner of our solar system called the Kuiper Belt, icy bodies lurk in the darkness, orbiting our sun at vast ...

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

A new look through decades-old data has unveiled some of the most compelling evidence yet of a hidden ninth planet in the far ...

They reveal a whole new level of detail in these planet-forming systems. Breakthroughs, discoveries, and DIY tips sent every ...

New data from the James Webb Space Telescope suggests a planet in a faraway solar system was consumed by a star by hurling ...

Caroline Delbert is a writer, avid reader, and contributing editor at Pop Mech. She's also an enthusiast of just about ...

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

The ongoing search for an additional planet at the solar system's edge has identified a new candidate, potentially ...

Astronomers have found new evidence that a mysterious ninth planet may be hiding at the edge of the solar system - rewriting what we know about the cosmos again. An international team from Taiwan ...