Using Pluto as an example, this celestial body, once considered the ninth planet, was redefined as a dwarf planet in 2006.

When you buy through links on our articles, Future and its syndication partners may earn a commission. An illustration of confirmed dwarf planets and their moons. From left to right: Pluto (with ...

Scientists have discovered methane gas on the dwarf planet Makemake, a finding that has surprised astronomers studying the outer solar system.

What if Pluto wasn’t the end? What if our Solar System hides dozens - maybe hundreds - of strange frozen worlds beyond Neptune? In this video, we take you on a journey through the mysterious outer ...

Looking Up is transcribed using a combination of AI speech recognition and human editors. It may contain errors. Please check the corresponding audio before quoting in print. Dean Regas: Okay, don't ...

At the very edge of our solar system, beyond the grasp of Neptune and even past the icy sprawl of Pluto’s domain, a new frozen world has emerged from the shadows. It’s not a new Earth or the mythical ...

For the first time since 2008, two new planets are being added to one of northern Maine's most famous — and scientifically accurate — roadside attractions. Dwarf planets Haumea and Makemake are the ...

An amateur astronomer discovered Pluto 95 years ago today. The former planet will complete an orbit in another 153 years. On February 18, 1930, just two weeks after his 24th birthday, Clyde Tombaugh ...

Eighteen years ago today, Pluto lost its planetary status in a vote by International Astronomical Union (IAU) members on the final day of their 2006 general assembly meeting. The word "planet" comes ...

I find the outer reaches of our solar system fascinating. It’s a place that we know very little about considering how relatively close it is – even its size is up for debate. It’s littered with icy ...

Using computer simulations, scientists based at NASA have pieced together the story of how the dwarf planet Haumea, found in the Kuiper Belt of icy worlds beyond the orbit of outermost planet Neptune, ...