If you answered "Pluto's planethood," your grasp of the astronomical is excellent. Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about ...

If you grew up learning that Pluto was a planet, chances are you were sticking to that, no matter what the IAU said. After all, it's not like anyone had truly seen Pluto before New Horizons ...

Why was Pluto reclassified as a dwarf planet? One might think that it’s purely a matter of size. Mercury, the smallest of the ...

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary ...

A new model that incorporates data gathered by the JWST could help scientists understand the composition and mass of objects ...

Forbes contributors publish independent expert analyses and insights. Jamie Carter is an award-winning reporter who covers the night sky.

Breaking news shocked Villanova’s campus last Saturday, March 15. Everyone remembers exactly where they were when they received the email. It was one of those moments in life that you will always ...

The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The ...

That's not just because it's too far away. In 2006, the International Astronomical Union (IAS) reclassified Pluto as a dwarf planet. That decision came several years after discovering the Kuiper ...

Ready or not, here comes the truth ... Lord of the Underworld and the planet of regeneration, Pluto’s influence is deeply hidden and obscure, but it never ceases to unveil what’s buried ...