2.3 KiB
| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Age of the universe | 4/4 | https://en.wikipedia.org/wiki/Age_of_the_universe | reference | science, encyclopedia | 2026-05-05T13:31:45.824475+00:00 | kb-cron |
== Assumption of strong priors == Calculating the age of the universe is accurate only if the assumptions built into the models being used to estimate it are also accurate. This is referred to as strong priors and essentially involves stripping the potential errors in other parts of the model to render the accuracy of actual observational data directly into the concluded result. The age given is thus accurate to the specified error, since this represents the error in the instrument used to gather the raw data input into the model. The age of the universe based on the best fit to Planck 2018 data alone is 13.787±0.020 billion years. A component to the analysis of data used to determine the age of the universe (e.g. from Planck) is to use a Bayesian statistical analysis, which normalizes the results based upon the priors (i.e. the model). This quantifies any uncertainty in the accuracy of a measurement due to a particular model used.
== See also == Age of Earth – Scientific dating of the Earth Anthropic principle – Hypothesis about sapient life and the universe Cosmic Calendar – Method to visualize the chronology of the universe (age of the universe scaled to a single year) Dark Ages Radio Explorer – Proposed concept lunar orbiter Expansion of the universe – Increase in distance between parts of the universe Hubble Deep Field – Multiple exposure image of deep space in the constellation Ursa Major Illustris project – Computer-simulated universes James Webb Space Telescope – NASA/ESA/CSA space telescope launched in 2021 Multiverse – Hypothetical group of multiple universes Observable universe – All of space observable from the Earth at the present Observational cosmology – Study of the origin of the universe (structure and evolution) Redshift observations in astronomy – Change in wavelength of light Static universe – Cosmological model in which the universe does not expand The First Three Minutes – 1977 book by Steven Weinberg Timeline of the far future – Scientific projections regarding the far future
== References ==
== External links ==