This is a 24 hour observation of all of the large aircraft flights in the world, condensed down to about 2 minutes. From space we look like a bee hive of activity. Those yellow dots are airliners, many with over 300 persons onboard! Note that the eastbound flights to Europe, from North America, are at night, and the westbound flights, from Europe are in daylight. You could tell it was summer time in the north by the suns foot print over the planet.  You could tell it was summer time in the north by the suns foot print over the planet. You could see that it didn't quite set in the extreme north and it didn't quite rise in the extreme south. With this 24 hour observation of aircraft travel on the earths surface we get to see the daylight pattern move as well.