Taken from a NASA video published February 11th on YouTube. The Solar Dynamics Observatory have created a stunning 5 year time-lapse video of the Sun, which is public domain and can be downloaded in various formats. A most excellent use of our taxpayer dollars, really!
In case you don’t have the time to stare at this for hours, the letters spell out “Haight Ashbury, San Francisco”. The underlying “strobing” image was assembled from graffiti filmed up and down Haight Street.