Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to ... .</ ...

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

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new ...

Elon Musk, under the username "Kekius Maximus," has joined William Shatner in advocating for Pluto's reclassification as a ...

The inner planets, including Earth, took at least 100 million ... a place in the outer solar system that’s home to dwarf planets Pluto, Eris and Makemake and millions of comets. Meanwhile, Jupiter ...

Some experts remain unconvinced about this discovery. It’s been almost two decades since our solar system lost its 9th planet. Pluto was officially reclassified from a planet to a dwarf planet ...

Are planets in the solar system that are closer to the Sun older ... The inner planets, including Earth, took at least 100 million years, maybe more. To put it another way, the four planets ...

Once the quirky underdog of our solar system, Pluto held planetary status until 2006, when it got a cosmic demotion that still stings space fans. Discovered in 1930, Pluto was the ninth planet for ...