Ai Weiwei's animal zodiac sculpture installation at Somerset House, London
A solar eruption that blasted an estimated billion tonnes of material into space has been captured by Nasa's Solar Dynamics Observatory.
The eruption, known as a coronal mass ejection (CME), was accompanied by a solar flare that emerged from a sunspot on Tuesday. The solar flare is expected to reach Earth later today. It could possibly affect power grids and GPS satellites.
>> Experts downplay threat to Earth from solar flare