Brinens and Things

raginrayguns:

tentacion1999:

In the equator, when the sun forms a right angle with the earth, the tree and its shadow.

eratosthenes wants to know how many stadia south of alexandria this is

I did some digging on this, and while it’s not that it *doesn’t* happen on the equator, it’s more complicated than that:

(photo by cmglee, STyx et al)

See also: https://en.wikipedia.org/wiki/Lahaina_Noon

Tags:

#geography #sun #shadows #neat #the more you know #reply via reblog