This photograph was taken by the crew on board the Columbia during its last mission, on a cloudless day. The picture is of Europe and Africa when the sun is setting. Half of the picture is in night. The bright dots you see are the cities’ lights. Note that the lights are already on in Holland, Paris, and Barcelona and that’s it’s still daylight in Dublin, London, Lisbon and Madrid
Celestial Fireworks - Hubble by Deep Space Photography - Resembling the puffs of smoke and sparks from a summer fireworks display in this image from NASA's Hubble Space Telescope, these delicate filaments are actually sheets of debris from a stellar explosion in a neighboring galaxy.