For many years spacecraft & satellites have taken night photographs of the Earth from space & now you too can have this astronaut's view of our planet. By day, cities viewed from space just look like grey marks but by night, city lights give perhaps the single clearest indication of man's habitation of the Earth. Over the years of satellite photography there has of course been a noticeable increase in the number of lights that can be viewed from space. Major cities are seen as bright dots on the night time map. Las Vegas is said to be the brightest spot on Earth. Can you spot New York, London, Mecca or Hong Kong? Much can be learned about a country from the number of lights it has. Countries like Japan with a dense population appear to be bright throughout, however this is also because lights in Japan are a brighter blue-green colour. In China there is a noticeable difference between the rural eastern & developed western regions. In Africa most of the noticeable lights are in coastal regions. Requires 4 x C batteries (not included).