Hidden Blog

Kepler's Platonic solid model of the Solar System from Mysterium Cosmographicum

The Elements and the Cosmos

by Alexander Ammonius The ancient Greek belief in five basic elements: earth (γῆ), water (ὕδωρ), air (ἀήρ), fire (πῦρ)--and later--aether (αἰθήρ), dates from pre-Socratic times and persisted throughout the Middle...

The Elements and the Cosmos

by Alexander Ammonius The ancient Greek belief in five basic elements: earth (γῆ), water (ὕδωρ), air (ἀήρ), fire (πῦρ)--and later--aether (αἰθήρ), dates from pre-Socratic times and persisted throughout the Middle...