The star cluster Pismis 24 lies in the core of the large emission nebula NGC 6357 that extends one degree on the sky in the direction of the Scorpius constellation. Part of the nebula is ionised by the youngest (bluest) heavy stars in Pismis 24. The.
Thierry Cohen made these by combining the daylight pics of the cities and the pristine skyline of the desert at the same latitude, direction, and angle. He wants to show what city dwellers would see without all the light pollution