Planet X: We are closing in on the solar system's new occupant
13 December 2017
Evidence for a new body perhaps the size of Neptune way out in the shadows is building – but if there is a ninth planet, it’s unlike any we have seen
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Premium
Found 275 results for dwarf planet
That interstellar asteroid could be a shard of a shredded planet
8 December 2017
'Oumuamua, an oddly shaped asteroid from beyond our solar system, recently passed by. It may have formed when a planet was ripped into fragments by its star
Planets near dangerous stars could shield alien life under smog
4 December 2017
Red and white dwarfs make nasty neighbours due to spurts of deadly radiation, but alien life could still form on planets nearby if shielded by smog or oceans
Odds on: 10 science breakthroughs you can bet on
10 May 2017
Human clones, a colony on Mars, alien contact... what world-changing breakthroughs will come in the next decade? We asked the experts – with some surprising results
How the sun abducted dwarf planets from an alien solar system
8 June 2016
The weird orbits of some bodies in the outer solar system reveal they are booty from an interstellar smash and grab raid, says astronomer Simon Portegies Zwart
Your explosive guide to the end of the universe
1 June 2016
Our sun will swell, our galaxy will collide with its neighbour and the universe could suddenly be swallowed by a vacuum bubble
Pluto: A whole new world in 5 strange photos
22 March 2016
Floating mountains, ice volcanoes and a churning plain of nitrogen sludge – pin-sharp pictures beamed back from Pluto are changing how we think planets work
The Oort cloud surrounds our solar system – why can't we see it?
16 March 2016
It's a giant sphere of a trillion rocks encircling us that occasionally sends comets slinging our way. That's a convincing story – but we'd love some direct evidence
Galactic GPS: How dead stars will guide us in deep space
3 February 2016
Plotting a course through outer space is tricky, but stellar corpses called pulsars are pointing the way to a new form of celestial navigation
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
