Parameters
z ≥ 0
z = 0 → today, z ≈ 1100 → CMB last scattering, z ≈ 20–30 → first stars
Cosmological Parameters
km/s/Mpc
dimensionless
dimensionless
dimensionless
dimensionless
Includes photons + 3 neutrino species at TCMB = 2.725 K
Computing for
z = 1.0
—
Time
| Age of universe at z | — |
| Lookback time | — |
| Age of universe today (z = 0) | — |
| Hubble time (1/H₀) | — |
Hubble Expansion
| Hubble rate H (z) | — |
| H (z) / H₀ | — |
| Deceleration parameter q (z) | — |
Distances
| Comoving distance DC | — |
| Angular diameter distance DA | — |
| Luminosity distance DL | — |
| Distance modulus μ | — |
| Angular size scale | — |
Contents of the Universe at z
| Total matter Ωm(z) | — |
| Baryons Ωb(z) | — |
| Dark matter Ωdm(z) | — |
| Radiation Ωr(z) | — |
| Dark energy ΩΛ(z) | — |
| Matter–radiation equality zeq | — |
| Matter–Λ equality zΛ | — |