Abstract

During his time at the Institute for Advanced Study, Kurt Gödel became a close friend of Albert Einstein, and in particular studied the theory of relativity. One result of this study was the discovery of the so-called Gödel universe (strictly speaking, it is about a whole class of universes; the singular form stands here as a collective noun.), a model of Einstein’s field equations of general relativity in which no absolute time can be defined. Theoretically, time travel would be possible in such a universe.