During an 11-year solar cycle, the sun's magnetic fields can become tangled and stretched.
The sunspot set off multiple explosions known as solar flares, which appear as bright flashes in the video.
The sun's magnetic energy reached a peak — known as a solar maximum — in 2014.
The sun's magnetic activity has declined since then, but NASA observers still managed to capture some noteworthy events, like Mercury passing in front of the sun in November 2019.
The video is peppered by the occasional dark frame, when either the Earth or moon passed between the sun and NASA's Solar Dynamics Observatory