This image is a ‘tachogram’ of the Sun, taken with the Polarimetric and Helioseismic Imager (PHI) Full Disc Telescope on ESA’s Solar Orbiter on 18 June 2020. It shows the line of sight velocity of the Sun, with the blue side turning to us and the red side turning away.
Solar Orbiter is a space mission of international collaboration between ESA and NASA.