The solar system has too many moons – it's time for a cull
23 October 2019
Designating rocks just a few kilometres across as moons is misleading and ridiculous. We need to do a Pluto and cut moons down to size, argues Leah Crane
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Premium
Pluto has an underground ocean kept warm by a layer of gassy ice
20 May 2019
Pluto may harbour an ocean that’s kept liquid by an extra layer of gas molecules trapped in the ice at the base of its frigid shell
Pluto is not a planet – it's a billion comets squished together
25 May 2018
Pluto’s heart-shaped ice plain is full of nitrogen, which hints that the tiny world is made from a billion comets and could have a buried ocean
Volcanoes that spew stretchy ice could make dwarf planets bright
20 October 2017
Something strange is happening on dwarf planets Eris and Makemake. They’re tiny and cold, but they still show surprising signs of geologic activity, like real planets
Distant dwarf planet near Pluto has a ring that no one expected
11 October 2017
The tiny world Haumea has a ring, the most distant we’ve found in our solar system. This may mean rings encircle other far-off worlds in the solar system
