Probe spies moon's volcanic plume
Nasa's New Horizons spacecraft has sent back images of a huge volcanic eruption on Jupiter's moon Io.
A massive dust plume, estimated to be 150 miles (240km) high, can be seen erupting from Io's Tvashtar volcano.
On Wednesday, the US probe flew by Jupiter, using the planet's gravity to boost its speed, reducing the travel time to its ultimate target of Pluto.
New Horizons also took photos of the icy moons Europa and Ganymede in the run-up to its encounter with Jupiter.
Turning its cameras to the giant planet itself, the spacecraft captured an image of Jupiter's little red spot, a nascent storm south of the famous great red spot.