All-sky photo of the night sky

This is the largest open-source, freely available all-sky photo of the night sky. With 40,000 pixels, this is arguably one of the best such images ever made. The colossal sky-scape was compiled using images taken by astrophotographer Eckhard Slawik from the best and darkest locations around the globe: Germany (Waldenburg), Spain (Tenerife, La Palma), Namibia and Chile. An annotated version can be found here.