Aliniamentul preistoric al minunilor Lumii

[maya]

A NEW LOOK AT AN OLD DESIGN
THE PREHISTORIC ALIGNMENT OF WORLD WONDERS- ALINIAMENTUL PREISTORIC AL MINUNILOR LUMII
JIM ALISON
http://home.hiwaay.net/~jalison/
http://home.hiwaay.net/~jalison/ref.html

Great circles are straight lines that go all the way around the center of the earth. The equator is a great circle. Meridians of longitude that cross over the north and south poles are also great circles. For every location on a great circle, it's antipodal location is also on the circle. Other than the equator itself, any great circle crosses the equator at two antipodal locations, 180° apart. Other than the equator and meridians of longitude that run due north and south, any great circle reaches it's maximum latitudes at two locations that are 90° of longitude east and west of the two locations where the great circle crosses the equator.