Why now (17:55) i can see the sun in Dublin and London is Night?
Because of the longitude difference. London is at longitude 0.13 degrees west, while Dublin is 6.27 degrees west. At a given latitude, the sun sets 4 minutes later per degree of longitude to the west, so Dublin’s sunset is about 24.6 minutes later. The difference in latitude also has an effect, but it is smaller. Here’s a bit more detail: London coordinates (in decimal degrees): latitude = 51.50 N longitude = 0.13 W Dublin coordinate (in decimal degrees): latitude = 53.34 N longitude = 6.27 W For sunset today (28 Feb 2008), the difference in latitude creates a 2.6 minute difference in sunset. That is, a city with the latitude of Dublin but longitude of London would have a sunset 2.6 minutes earlier than London. Thus, we have the following: Dublin sunset time relative to London sunset time: effect of latitude: 2.6 minutes earlier effect of longitude: 24.6 minutes later net effect: Dublin sunset is 22.0 minutes later The 24.6-minute offset due to longitude is constant through the year. T
