Constants & Units · constant
Age of the universe
t₀ = 13.797 ± 0.023 Gyr
- Unit
- Gyr
- Value
- 13.797 ± 0.023
- Exact
- no
- Note
- Derived from the Friedmann equations given the densities above — not observed directly.
- Symbol
- t₀
- Category
- Cosmological
- Numeric
- 13.797
- Uncertainty
- ±0.023 (Planck 2018)
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