A method of measuring time based on time at the prime meridian/ ... Title, legend, grid system, direction, scale ... If you wanted to draw a map for the purpose of telling time, how many degrees ...
1 is Improving knowledge of other cultures
Because circumpolar constellations never rise or set, they provide reliable reference points for astronavigation. Knowing the circumpolar constellations in each hemisphere allows navigators to find their way using only the stars.
