In 2008, WMAP confirmed within a two percent chance of error that its curvature is flat.
The High-Z Supernova Search is currently attempting to trace the expansion of this entity. In 2008, WMAP confirmed within a two percent chance of error that its curvature is flat. About 72 percent of this entity's mass-energy density is composed of dark energy, and this entity's age can be measured by fluctuations in cosmic microwave background radiation. Its expansion is explained by Hubble's Law, and if Omega is greater than one, it will eventually collapse in the "Big Crunch." For 10 points, name this entity whose origins are explained by the Big Bang.
The High-Z Supernova Search is currently attempting to trace the expansion of this entity.
The {Universe}