10 mysteries of the universe: Is our solar system normal?
19 September 2018
Puffball planets the density of polystyrene are just some of the oddities we’ve spied in other solar systems – is our own backyard the exception, not the rule?
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Premium
NASA’s deep-space mission to a $10 quintillion all-metal world
15 August 2018
The unique metal asteroid Psyche may be a space miner's fantasy – but there are better reasons to want to visit it, says mission leader Lindy Elkins-Tanton
Forgotten giants: Why the time is ripe to revisit Uranus and Neptune
25 July 2018
A fleeting glimpse of the ice giants 30 years ago hinted at very weird science that could tell us a lot about exoplanets. Now we have a rare chance to go back
Why weird star systems are where we'll find alien life
18 July 2018
In the hunt for life beyond Earth, we've been looking for planets and stars like our own. But that is flawed – and a new plan promises answers in our lifetimes
Nine probes reached the outer solar system: Where are they now?
12 September 2017
Besides Cassini, eight missions have passed the asteroid belt – and several are still broadcasting from the furthest solar system and beyond
The ethics issue: Should we colonise other planets?
5 July 2017
As ever more potentially habitable exoplanets are discovered, it's time we asked ourselves: do we have the right to take over another world?
