1.Previous
3.Next

for example, when it is solar noon in London, it is about 10 minutes before solar noon in Bristol, which is about 2.5 degrees to the west. Local solar time has been associated with civil timekeeping since the development of sundials; for example, 1500 BC, an ancient Egyptian sundial was used to measure laborers' work hours. In the 2nd century BC, Hipparchus developed a method to measure longitudinal distances

1.Previous
3.Next