Living on a donut planet
The hourglass earth
The hidden geometry of our Earth
007skaty Scientists model the gravitational pull of a hypothetical donut-shaped Earth.
007skaty A toroidal Earth has uneven gravity, pulling strongest at the top and bottom polar rings and weakest along the outer equator.
007skaty A donut-shaped Earth's geometry arches oceans and cities directly across the daytime sky
What would you see directly overhead if you stood on the inner equator of a donut Earth?
Donut Earth gravity: You would weigh significantly less at the outer equator than at the polar rings of a donut-shaped planet.
007skaty Fling satellites into looping paths to learn how gravity works on a hyperboloid Earth.
Who was the physicist who first mathematically analyzed the stability of self-gravitating toroidal rings in 1893?
What unusual shape would a satellite's orbit trace as it passes through a toroidal planet's central hole?
A three-dimensional geometric surface or solid shaped like a doughnut. In 2014, Anders Sandberg modeled a toroidal Earth, calculating its day would last less than three hours.
If a donut Earth collapsed due to slowing down, what shape would it naturally take?