You know, if you think about it, and trust me we're about to, the moon is kind of weird. Of all the terrestrial worlds of the ...

On Aug. 24, 2006, the International Astronomical Union (IAU) decided that Pluto wasn't a planet anymore. Instead, Pluto is ...

On August 24, 2006, Pluto ceased to be considered a planet. A mixture of rock and ice located in the Kuiper Belt, a region of icy objects beyond the orbit of Neptune. This demotion ...

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper ...

A study suggests an Earth-sized planet, dubbed Planet Y, may exist beyond Neptune, affecting the orbits of icy objects in the ...

On August 24th, 2006, Pluto was officially demoted from being a planet, which apparently caused some people to be outraged. Pluto didn’t meet the final rule, as Britannica writes: So, what was the IAU ...

Pluto, once considered the ninth planet of our solar system, has been a topic of intrigue since its reclassification as a ...

The solar system has many more moons than the one we can see in the sky. But how many do we actually know about? And how many ...

Independent previous research has also proposed a similar Planet Y to explain the warp or other features in the TNO population. The good news is that the existence of this planet might be confirmed or ...

Astronomers have picked up evidence of an Earth-sized world, distinct from the previously hypothesised Planet Nine and Planet ...

Jim Bickford is leading the Thin Film Isotope Nuclear Engine Rocket (TFINER) project to develop a system for propelling a ...

Scientists studying the cosmos often speculate about hypothetical forces that might explain peculiar data or results. For instance, some astronomers have suggested that our solar system has an extra ...