Pluto, the small, icy celestial body at the back of the solar system, was downgraded from a regular planet to a dwarf planet in 2006. It has been known as just that for years - the planet that never was. But NASA's New Horizons mission,...

The International Astronomical Union should ‘rescind their non-scientific definition’ of Pluto as a dwarf planet, according to a five-year study

Learn about the 5 dwarf planets -- Ceres, Pluto, Haumea, Makemake, and Eris -- with this space science song by KLT!

I'm sure most of us grew up with the knowledge that Pluto was our solar system's ninth planet. So what changed about the definition?

Pluto has a thin atmosphere, let's learn about it!

What's happening over and under Pluto's fascinating surface.

A new study suggests that scientists may have found proof of liquid water being spewed out of Pluto’s volcanoes. <br/>

Learn about our solar systems Dwarf Planet Haumea with this Dwarf Planet Song. Brought to you by KLT.

Pluto's not a planet. We're sorry, but we think it's time you move on. If you've gone through all your breakup music and Meg Ryan movies, and you still can't get over it, then SciShow Space will get out the ice cream, cuddle up with you...

After Pluto's demotion to dwarf planet in 2006, our solar system went from having nine planets to eight. But about a decade later, some astronomers proposed there was another planet, larger than Earth, hiding in the Kuiper Belt. And in...

Astronomers are trying to answer the question of how Pluto formed, and we have more evidence for the existence of Planet Nine!

Astronomers may have figured out some cool geology on Pluto, and Barnard's star is back in the running for having a planet!

Since New Horizons flew by Pluto on July 14, 2015, it's completely redefined what we know about the dwarf planet and its largest moon Charon. New Horizons' mission will continue to be full of surprises, but here's what we've learned so far

The ESA is working on a 'fresh-squeezed' spacecraft that will explore Jupiter's moons, and the New Horizons team makes a case for Pluto (and many others)!

SciShow Space News explains how we lost track of a resupply mission, explores Pluto’s newfound ice caps, and helps you find Mercury.

Pluto's heart is revealing itself to be a major influence on the dwarf planet’s landscape and atmosphere, and scientists used atom probe tomography (APT) for the first time on lunar soil to study it atom by atom!

Earth has seasons, but what about the rest of the planets in the solar system? Let’s take a tour from Mercury to Pluto and see what seasons would be like on all our planetary neighbors. Bring a sweater!

According to a new model, days on Earth used to really fly by, and today Pluto has wind-swept dunes made of very weird sand.

Some funky orbits near the Kuiper Belt are hinting towards a brand new planet, the elusive ‘Planet X.’ Our friends Mike Brown and Konstantin Batygin of Caltech are working hard to finally spot the potential gas giant through powerful...

According to some of the latest New Horizons data, Pluto's got flowing nitrogen ice and only half the atmosphere it had two years ago. Plus, the latest batch of exoplanets includes a world that's a lot like Earth... probably.

New Horizons is teaching us all about Pluto! And it's definitely not what we were expecting.

On July 14, 2015, New Horizons flew by Pluto. Scientists have used the data from the mission so far to uncover active geology, an enormous canyon, a unique case of chemical coloration, and more. What else might we discover as we venture...

Astronomer Jean-Luc Margot has come up with a new definition for planets that may help us categorize worlds outside of the solar system, and we may have also discovered a new dwarf planet within the solar system!

Astronomers have found more evidence for Planet 9, but another study has added another problem to our list of space travel problems.