Pluto
Astronomy explained | Why is Pluto not a planet?
Is Pluto a planet? If not, why not? What makes a planet a planet, and why was the 9th in the Solar System reclassified as a dwarf planet?
Pluto and the planet problem
In this archive article written before Pluto was reclassified, the late Patrick Moore gives his tuppence one of astronomy's most burning questions.
Observing guide | Can you find Pluto in the night sky?
See if you can spot dwarf planet Pluto by photographing the night sky.
Radio Astronomy Podcast | Pluto at 90: how Clyde Tombaugh discovered a new world
The latest episode of Radio Astronomy marks 90 years since the discovery of Pluto
Astronomers you should know | Clyde Tombaugh
The story of the American amateur astronomer who made an incredible discovery.
What's warming Pluto's icy heart?
Pluto's heart-shaped Sputnik Planitia could be hiding a liquid water ocean.
Interview: Ramy El-Maarry, New Horizons scientist
Ramy El-Maarry discusses the New Horizons mission and its Ultima Thule fly-by.
What did New Horizons discover at Pluto?
Paul Abel reveals what New Horizons has shown us about dwarf planet Pluto, which it flew by in 2015.
New Horizons reveals latest Pluto images
Pluto's terrain is revealed in greater clarity than ever before in these latest images sent back to Earth by New Horizons.
How Pluto's moon Charon was discovered
Pluto's moon Charon was discovered on 22 June 1978 by US astronomer James Christy while examining images of Pluto. We explore how this momentous find came to be.
The Story of the Solar System: Geysers on Triton
Turned to vapour by faint sunlight, subsurface nitrogen on Neptune’s largest moon Triton bursts to the surface in dramatic plumes originally spotted by the Voyager 2 spacecraft.
Ice dunes discovered on Pluto
New Horizons images have enabled astronomers to discover methane ice dunes on Pluto, right next to the dwarf planet's heart-shaped feature.
New Horizons: ice volcanoes and spinning moons
Data sent back by the New Horizons spacecraft has revealed what may be ice volcanoes on the surface of Pluto, and the 'pandemonium' of its spinning moons.
New Horizons phones home
After successfully completing its flyby of Pluto, New Horizons has sent confirmation of the mission's success back to Earth, before beginning a new journey to the edges of the Solar System.
Pluto's icy mountains revealed
New images sent back to Earth from the New Horizons mission have surpassed expectations, NASA mission scientists say.
New Horizons reveals Charon's surface features
Data from NASA’s New Horizons mission has uncovered the intricacies of Pluto’s moon Charon for the first time.
Cheltenham Science Festival: The Kuiper Belt
Dave Jewitt and Jane Luu discuss this far-flung corner of our Solar System.