At night, Earth's surface is covered with a delicate tracery of lights, particularly in regions that have a long history of urban development (such as Europe). Large urban areas are recognizable from orbit due to extensive electric lighting and distinct street patterns. With smaller urban areas spread across the land surface and coastlines, the outlines of continental land masses are easily discernable at night.
This astronaut photograph highlights the nighttime appearance of the southern Italian Peninsula. The toe and heel of Italy's boot are clearly defined by the lights of large cities such as Naples, Bari, and Brindisi, as well as numerous smaller cities and towns. The bordering Adriatic, Tyrrhenian, and Ionian Seas appear as dark regions to the east, west, and south. The city lights of Palermo and Catania, Sicily, are also visible.
The International Space Station (ISS) was located over an area of Romania, close to the capital city of Bucharest (approximately 945 kilometers to the northeast) at the time this image was taken. Part of a solar panel array on a docked Russian spacecraft is visible in the foreground. The distance between the image subject area and the position of the photographer, as well as the viewing angle looking outwards from the ISS, contributes to the foreshortened appearance of the Italian Peninsula and Sicily.
Caption by William L. Stefanov, Jacobs/ESCG at NASA-JSC.
Image courtesy of NASA