Читать книгу Geography For Dummies - Jerry T. Mitchell - Страница 58

With the starting lines in place, one can now contemplate putting all of the other lines of latitude and longitude on a globe. In doing that, Hipparchus used the notion that 360 degrees (°) are in a circle (But why 360? See the sidebar “Why is Earth 360° round?”). Accordingly, he drew lines of latitude such that each and every one is separated by one degree of arc from the next. He then did the same with longitude. This is why lines of latitude and longitude are referred to as degrees.