arcorLogoPictures description & credit:

Top: Spiral galaxy Messier 81 –  Spitzer Space Telescope, Infrared Array Camera at wavelengths of 3.6 (blue), 4.5 (green), 5.8 (yellow), and 8.0  (red) microns;

Credit: NASA/JPL/Caltech/Harvard-Smithsonian Center for Astrophysics

Left: First Image of a Black Hole, at the center of  the supermassive elliptical galaxy Messier 87 in the Virgo galaxy cluster, 55 million light-years away  –  Event Horizon Telescope at wavelength 1.3 mm;

Credit: EHT Collaboration ©

Right: Saturn’s dynamic aurora 1 (28 Jan 2004)  –  Hubble Space Telescope in optical (Advanced Camera for Surveys) and ultraviolet (Imaging Spectrograph);

Credit: NASA, ESA, J. Clarke (Boston University, USA), and Z. Levay (STScI)