Big Dipper, Deep Sky
The Big Dipper is an easy to recognize, well-known asterism in northern skies, though many see the Plough or Wagon . Famous bright nebulae of the north can also be found along its familiar lines, highlighted in this carefully composed scene with telescopic insets framed in the wider-field skyview. All from Messier's catalog, M101 and M51 are cosmic pinwheel and whirlpool on the left, spiral galaxies far beyond the Milky Way. To the right, M108, a distant edge-on spiral galaxy is seen close to our galaxy's own owl-faced planetary nebula M97. Taken on January 16 , the wider-field view seems to include an extra star along the Dipper's handle, though. That's Comet Catalina ( C/2013 US10 ) now sweeping through northern nights .