The outermost sphere of the Aristotelian five-element universe is composed of this dry material.
According to Chrysippus, the cosmos is cleansed by this material at the end of the Great Year and then modeled by palingenesis. Pythagoras of Samos believed that a "counter-earth" orbited a planet made entirely of this material. Plato's Timaeus argues that the presence of this substance provides the world with a sense of visibility. The outermost sphere of the Aristotelian five-element universe is composed of this dry material. One thinker who believed that the world was made out of this thing believed that the world is in a state of flux. That man was Heraclitus. For 10 points, name this classical element that is opposed by water.
According to Chrysippus, the cosmos is cleansed by this material at the end of the Great Year and then modeled by palingenesis.
fire