Something unexpected is happening on the Sun, Nasa has warned.
This year was supposed to be the year of “solar maximum”, the peak of the 11-year sunspot cycle.
But solar activity is relatively low.
“Sunspot numbers are well below their values from 2011, and strong solar flares have been infrequent”, the space agency says.
Experts have been baffled by the apparent lack of activity – with many wondering if NASA simply got it wrong.
Well, this might be the calm before the solar storm…