Abe Fehr wrote:
I found this interesting fact written by Paul Sutter,
βDuring a lunar eclipse, Earth passes between the sun and the moon, allowing Earth to cast its shadow on the moon. That shadow is always, always, always a circle, no matter where you are on the planet, no matter the timing of the eclipse. Always.
The only way to always cast a circular shadow is if the thing casting the shadow β in this case, Earth β is a globe. It's a matter of geometry.β
Yes, but it's a flat circle. π