From The Hydrogen Sonata:
The Caconym was silent for a few moments. It watched a small solar flare erupt from near one side of the sunspot over which it had stationed itself. Another tendril of the star’s gaseous shrapnel, ejected by an earlier outburst of the furious energies erupting for ever beneath it, and thousands of kilometres across and tens of thousands long, washed over and around it, bathing its outer field structure in radiation and delivering a distinct physical blow.
It allowed itself to be gently buffeted by the impact, using its engine fields to adjust its apparent mass and so increasing its inertia so that the effect would fall within acceptable parameters, while observing the outermost elements of its field structure deform inwards by a few micrometres under the weight of the blast. The effect of the colliding gust of plasma was to send it drifting very slightly across the face of the sunspot, spinning slowly.
Link to the rest at The Hydrogen Sonata