To do that, I’ll use what’s called latitude and longitude.Lines of latitude run around the Earth like imaginary hoops and have numbers to show how many degrees north or south they are from the ...

With the first number indicating latitude, and the second number representing longitude (the minus sign indicates "west").

Every hour it moves 15 degrees. This means that if the sun is above the longitude of 0 degrees at noon, one hour later it will be above 15 degrees West. Now if you have a chronometer (this is just ...