Shock wave in Stephen’s Quintet captured by Spitzer. Image credit: NASA/JPL-Caltech. Click to enlarge This photograph, taken by the Spitzer space telescope and a ground-based telescope in Spain, shows the Stephan’s Quintet galaxy cluster, with one of the largest shockwaves ever seen in the Universe. The green arc in the photograph is the point which … Continue reading Shock Wave in Stephan’s Quintet Galaxy