Photographer Julien Looten: ‘An exceptional airglow illuminated the sky, resembling multicoloured clouds. This phenomenon occurs due to a chemical reaction in the upper atmosphere, emitting faint light known as #chemiluminescence. You can also see, from left to right, Sirius and the constellation of Orion, Mars, the Pleiades, the California nebula, Cassiopeia, the double cluster of Perseus, and the Andromeda'