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This information was used to estimate an age for the star of 14.46 ± 0.8 billion years. Due to the uncertainty in the value, this age for the star would possibly conflict with the calculated age of the Universe as determined by the final 2018 Planck satellite results of 13.787 ± 0.020 billion years .
In 1862, the physicist William Thomson, 1st Baron Kelvin published calculations that fixed the age of Earth at between 20 million and 400 million years. [19] [20] He assumed that Earth had formed as a completely molten object, and determined the amount of time it would take for the near-surface temperature gradient to decrease to its present value.
Data has been accumulated from several clusters younger than one billion years (Gyr) of age and one cluster with an age of 2.5 Gyr. Another data point on the surface is from the Sun with an age of 4.56 Gyr and a rotation period of 25 days. Using these results, the ages of a large number of cool galactic field stars can be derived with 10% ...
Various methods and tools are involved in stellar age estimation, an attempt to identify within reasonable degrees of confidence what the age of a star is. These methods include stellar evolutionary models , membership in a given star cluster or system , fitting the star with the standard spectral and luminosity classification system , and the ...
The age of a sample is determined by analysing several minerals within multiple subsamples from different parts of the original sample. The 87 Sr/ 86 Sr ratio for each subsample is plotted against its 87 Rb/ 86 Sr ratio on a graph called an isochron. If these form a straight line then the subsamples are consistent, and the age probably reliable.
Dating creation is the attempt to provide an estimate of the age of Earth or the age of the universe as understood through the creation myths of various religious traditions. Various traditional beliefs hold that the Earth, or the entire universe, was brought into being in a grand creation event by one or more deities.
{{Birth date and age}} – used on most biographical entries {{Birth date and age2}} – calculates age at a specified date {{Birth based on age as of date}} – used when a reference mentions the age of a person as of the date of the reference's publication {{Birth year and age}} {} {{Death date and age}} {{Death year and age}}
The results varied widely (though consistently with a normal distribution of errors in the measurements), and included multiple date ranges (of 1σ confidence) that did not overlap with each other. The extreme measurements included one with a maximum age of under 4,400 years, and another with a minimum age of over 4,500 years. [17]