NGC 891 is an edge-on Hubble class Sb galaxy in Andromeda. It's equatorial dust lane completely obscures its central nucleus. Ironically, this same dust lane would render our Milky Way galaxy invisible from most of NGC 891. Exposures: L:R:G:B=260:160:160:160 minutes=12 hours 20minutes total exposure at f/8.3.

This image was published in the March, 2017 issue of Astronomy Magazine and was also a Picture of the Day on Astronomy.com.