Science What's that thing in Uranus's orbit – and how did it get there?

Scientists have located three Centaurs – asteroid-comet hybrids – in Uranus's orbit, including one that's moving oddly in the planet's wake.


The planet Uranus – already an odd duck for its upended rings and spin axis that means it is spinning on its side – is being chased by two asteroids and is chasing another. One of the asteroids is in an unexpected orbit, by some estimates