Galaxy-mapping Gaia space telescope gets an eye test from Pluto
22 January 2016
The European Space Agency craft designed to map a billion stars in the Milky Way has also been keeping an eye out for everyone's favourite dwarf planet
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Premium
Found 675 results for dwarf planet
Hints that 'Planet Nine' may exist on edge of our solar system
20 January 2016
An unusual alignment between the orbits of six small bodies in the Kuiper belt suggests there is an undiscovered planet 10 times the mass of Earth
Solar system mysteries: Is there a planet X?
20 January 2016
Wobbles in the orbit of two distant dwarf planets are reviving the idea of a planet hidden in our outer solar system. Two new discoveries could fit the bill
Star Wars universe passes real-world test for alien head count
16 December 2015
The Drake equation, which gauges the chance of finding alien life, has been applied to a galaxy far, far away. 91av asked astronomers to weigh in
Public vote renames planets after gods, monsters and scientists
15 December 2015
The International Astronomical Union has announced the results of a contest to name far-off planets, and Copernicus, Veritate and Sancho are among the winners
From Pluto fly-by to head transplants – the best stories of 2015
15 December 2015
This year was full of exciting stories, including mystery signals from space and the discovery of a new ancient human relative. Here are some of our favourites
Dwarf planet Ceres looks like an asteroid but acts like a comet
9 December 2015
Shiny spots and minerals on Ceres suggest it may have been born in the outer solar system, and that our classification of asteroids and planets is wrong
Beyond Pluto: New Horizons probe aims for another unseen world
18 November 2015
As Earthlings gawp at the dwarf planet, NASA's plucky probe is gearing up for one last mission: a close encounter that could rewrite solar system history
Pluto kept alive by antifreeze – other icy worlds could be too
18 November 2015
Ice volcanoes and other geological oddities on the dwarf planet hint at an outer solar system full of frozen yet active worlds
Our moon would be a planet under new definition of planethood
13 November 2015
When astronomers last redefined "planet", Pluto was demoted to being a dwarf. A proposed revision to the criteria would instead grant planethood to the moon
