Spiral galaxy M101 is enormous, almost twice the size of our own Milky Way at over 170,000 light-years across . Recorded at infrared wavelengths by the Spitzer Space Telescope, this picture shows starlight in blue hues while the galaxy’s dust clouds are in red.
Image Credit: NASA
Visually in my 8″ Newt, M101 made me audibly gasp when I first got it in view.
Breathtaking.