Nearly a century after Pluto’s discovery, astronomers are still hunting for mysterious planets beyond Neptune - including a ...

New evidence shows that, far beyond Pluto, there may exist a hypothetical planet referred to as Planet X or Planet Nine.

As telescopes have become more powerful, it’s turned out our solar system is not the only game in town: There are millions of ...

It is a question that feels like it should have a straightforward answer: how many planets are there in our solar system? Since Pluto was relegated back down to dwarf planet status, almost everyone ...

If you've ever wondered why we are here, then you can thank Jupiter for part of the answer. A new study from Rice University ...

An exoplanet is what we call planets that exist outside of our own solar system. The first one was discovered in 1992, but as we get more powerful and precise telescopes and instruments, scientists ...

Since the dawn of civilization, humanity has wondered whether we are alone in the universe. Some people—myself ...

While 3I/ATLAS is getting all the attention, there are a number of other comets visible through telescopes and binoculars in the sky. Here are five of them.

DayZ and Kerbal Space Program's creators have joined forces with an ex-SpaceX engineer to create the ultimate spaceflight ...

A University of Iowa researcher has been awarded funding from NASA to create an interstellar map that could lead to more accurate observations of planets located outside our solar system — known as ...

An interstellar object known as 3I/ATLAS has gathered a significant amount of attention in the planetary science sphere, and soon it will reach its closest point to the sun. 3I/ATLAS is the third-ever ...