Time-lapse movie of the sunspot taken in blue light where the spatial resolution is highest. The whole sequence corresponds to 53 minutes in real time. The penumbral filaments seem to move inwards, but in reality the gas flow is actually mainly directed outwards, away from the dark umbra. This is the Evershed effect which becomes observable with spectroscopic techniques, taking advantage of the Doppler effect on spectra lines. The movie has been colorized for aesthetic reasons. This movie with up to 0.1 arcsecond resolution from the Swedish 1-m Solar
Telescope represents the limit of what is currently possible in terms of spatial resolution. This video relates to an article that appeared in the June 2, 2011, issue of Science Express, published by AAAS. The study, by G.B. Scharmer of Stockholm University in Stockholm, Sweden, and colleagues was titled, "Detection of Convective Downflows in a Sunspot Penumbra."