http://www.newsweek.com/solar-cycle-activity-impact-space-missions-moon-artemis-1736107

The sun is ramping up for Solar Cycle 25's solar maximum at a faster rate than previously expected, which could have knock-on effects on future space missions, experts say.

At solar maximum, the sun has a lot more sunspots—dark-looking areas where the coronal magnetic fields are particularly strong—on its surface, which are associated with increased solar activity, including solar flares and coronal mass ejections (CMEs). If aimed at Earth, these can influence and disrupt electromagnetic communications and the power grid.