In the FLRW metric, this phenomenon is described by a factor with a positive second derivative, a(t) ("a of t").
In the FLRW metric, this phenomenon is described by a factor with a positive second derivative, a(t) ("a of t"). Bondi, Hoyle and Gold proposed that matter is continually created as this process occurs, known as steady state theory. Evidence for this phenomenon includes measurements of galactic radial velocities and observations of redshift in nearby galaxies. Driven by dark energy, its rate is given by Hubble's constant, currently around 70 kilometers per second per megaparsec. For 10 points, name this accelerating phenomenon, a consequence of the Big Bang that causes two points in space to grow further from each other over time.
In the FLRW metric, this phenomenon is described by a factor with a positive second derivative, a(t) ("a of t").
{expansion} of the {universe} [or {cosmic expansion}, {expansion} of {space}, and other equivalents]