Deceleration parameter
type: Concept
narrower: Accelerating universe

Accelerating universe
type: Concept
contributor: AAS Frey.Katie
broader: Deceleration parameter
definition: The deduction based on the observation that the most distant Type Ia supernovae are fainter than that expected from their redshifts in a matter-only dominated expanding Universe. The faintness is attributed to larger distances resulting from an accelerating Universe driven by presence of a new component with strongly negative pressure. This component that makes the Universe accelerate is named dark energy.
modified: 2020-11-03T17:46:10.529Z
modified: 2020-11-03T17:45:49.551Z