Gliese 581-G (Just for fun)

[Nexis]

HI.

I was reading this thread and had a thought. Depending, of course, on the planet having a small or large elliptical orbit. This may cause sun watchers to see the sun "Beat like a heart" in a year. This may have more theological implications than navigational.

The other idea comes from Eratosthenes. The scholar who measured the circumference of the world by measuring the path of the sun by studying the shadow of a stick. If you place a stick directly under the sun at 90 degrees from the ground it would cast no shadow. Moving away from that stick and place another, it would cast a shadow directly away from the center under the sun. Do this in a circle and farther away you can have a very accurate navigation instrument and mapping. Carrying a "Sun Compass" will tell you how far away you are from the "Sun-ward" center of the world and the direction of the shadow will always point in that direction. That will create a compass if you standardize the height of the stick you can measure the distance away you are from "Sun-ward" by measuring the length of the shadow. Say If you want to reach the city of Randar you must travel North- East of sun-ward for seven shadow lengths. North south east and west generally being directions away from the Sun Center of the world.