The Stars of Mercator - time lapse of the night sky above La Palma

Time lapse movie showing the night sky and the scenes before and after an observing night at the Mercator telescope ( ) situated on the island of La Palma among several other astronomical instruments of the Observatorio del Roque de los Muchachos ( ). Some interesting things to be noticed: -Geosynchronous satellites visible as “standing still stars“ in front of the “rotating background“ of real stars, disappeari