Sh2-171 – The Question Mark Nebula in Cepheus. A two-panel mosaic covering over 100 light-years of active star formation, powered by Berkeley 59 — a cluster just 2 million years old. Its O5V star BD+66 1673 burns at 45,000 Kelvin, sculpting the dark pillars visible throughout the frame. Processed in Hubble Palette (HSO).

https://adfr.io/astro/20260310_sh2-171

#Astrophotography #Narrowband #Sh2171 #NGC7822 #Cepheus #HubblePalette #DeepSky #Nebula #astrodon #astrophoto #deepsky