An article published in “The Astrophysical Journal Letters” reports the results of multiband observations of the area around the supermassive black hole at the center of the galaxy M87. 33 members of the Multiwavelength Science Working Group of the Event Horizon Telescope (EHT) led a large team of researchers who put together data collected by the various radio telescopes that made up the EHT in the extraordinary campaign of observations which led to the historical photo published in 2019 and other data of observations in other electromagnetic bands conducted with various space and ground-based telescopes. This allows to conduct more in-depth analyzes thanks to the completeness of the emissions detected not only by the supermassive black hole but also by its jets that eject materials at very high speeds.