Passage: NASA's Wilkinson Microwave Anisotropy Probe (WMAP) aikin saki bayanai na shekaru tara a cikin 2012 ya kiyasta shekarun duniya ya zama (13.772 ± 0.059) × 109 shekaru (13.772 biliyan shekaru, tare da rashin tabbas na ƙari ko rage shekaru miliyan 59). Duk da haka, wannan shekarun ya dogara ne akan zaton cewa samfurin da ke cikin aikin ya kasance daidai; wasu hanyoyin da za a kiyasta shekarun duniya na iya ba da shekaru daban-daban. Daukar ƙarin yanayin ƙarancin ƙwayoyin halitta, alal misali, na iya faɗaɗa sandunan kuskure na ƙuntatawar WMAP ta tsari ɗaya na girma. Ana yin wannan ma'auni ta amfani da wurin daɗaɗɗen ƙarancin ƙarancin sauti a cikin ƙarfin wutar lantarki na microwave don ƙayyade girman girman farfajiyar farfajiyar (girman duniya a lokacin da aka sake haɗuwa).
Tsarin da aka yi amfani da shi