Spiral galaxy M101. Image credit: NASA/ESA Click to enlarge This amazing photograph of galaxy M101 (also known as the Pinwheel Galaxy) was taken by the Hubble Space Telescope – it’s the largest and most detailed photo ever taken of this galaxy. The photo is actually composed of 51 separate Hubble exposures, stitched together on computer. … Continue reading "Hubble Portrait of the Pinwheel Galaxy"