Accelerating expansion of the universe
RATE OF INCREASE IN THE EXPANSION OF THE UNIVERSE
Accelerated expansion; Cosmic acceleration; Accelerating Universe; Explanatory models; Acceleration of the universe; Accelerating expansion of the cosmos; Accelerating expansion of the Universe; Accelerating universe; Cosmic speed-up
Observations show that the expansion of the universe is accelerating, such that the velocity at which a distant galaxy recedes from the observer is continuously increasing with time. The accelerated expansion of the universe was discovered during 1998 by two independent projects, the Supernova Cosmology Project and the High-Z Supernova Search Team, which both used distant type Ia supernovae to measure the acceleration.