... Detailed View of a Solar Eclipse Corona . ... Normally overwhelmed by the bright solar disk, the expansive corona, the sun's outer atmosphere, is an alluring sight. ... There, two bright sources at the center of this composite x-ray (blue)/radio (pink) image are thought to be co-orbiting supermassive black holes powering the giant radio source 3C 75. ... Only 11 million light-years away, Centaurus A is the closest active galaxy to planet Earth. ... Mars Over the Allalinhorn . ...