Nucleocosmochronology, also known as cosmochronology,'s a relatively new technique used to determine timescales for astrophysical objects and events. This technique employs the abundances of radioactive nuclides in a way that's very similar to the use of C14 in dating archeological samples, save that the elements measured are typically uranium and thorium. Nucleocosmochronology has already been successfully employed to determine the age of the Sun (4.57±0.02 Ga, for example, 4.57×109 y… (More on Nucleocosmochronology)