big Bang
Overview page. Subjects: Physics — Astronomy and Astrophysics.
The hypothetical but widely accepted ‘explosive’ event that marked the origin of the universe as we know it. At the time of the Big Bang, the entire universe was squeezed into an infinitely...
Lemaître universe
Overview page. Subjects: Astronomy and Astrophysics.
A model of the universe containing a cosmological constant term, named after G. É. Lemaître. In this model, space has a positive curvature but expands for ever. The Lemaître universe is...
