Expansion of the Universe
The Friedmann-Walker-Robertson metric is
The scale factor evolves according to
\[\left(\frac{\dot a}{H_0}\right) \pm \left(1 - \Omega_0 + \frac{\Omega_M}{a} + \frac{\Omega_R}{a^2} + a^2\Omega_\Lambda\right)^{1/2}.\]
The Friedmann-Walker-Robertson metric is
The scale factor evolves according to
\[\left(\frac{\dot a}{H_0}\right) \pm \left(1 - \Omega_0 + \frac{\Omega_M}{a} + \frac{\Omega_R}{a^2} + a^2\Omega_\Lambda\right)^{1/2}.\]
Settings
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