ki te whiti i raro nei, me te whakahoki i te pātai i muri i roto i te reo ano rite te whiti: Passage: NASA o Wilkinson Microwave Anisotropy Probe (WMAP) kaupapa e iwa-tau tuku raraunga i roto i 2012 tata te tau o te ao ki te kia (13.772±0.059) × 109 tau (13.772 piriona tau, ki te kore o te tāpiri, te tangohanga ranei 59 miriona tau). Heoi, e hāngai ana tenei tau i runga i te whakaaro e he tika te tauira o te kaupapa o raro; ētahi atu tikanga o te whakatau i te tau o te ao e taea te hoatu tau rerekē. Te whakaaro i te papamuri atu o ngā matūriki relativistic, hei tauira, e taea te whakanui i te hapa paepae o te WMAP herenga i te kotahi tikanga o te nui. Kei te hanga tenei inenga mā te whakamahi i te wāhi o te tihi tuatahi oro i roto i te mana papamuri ngaru ngaru ki te whakatau i te rahi o te mata o te decoupling (te rahi o te ao i te wa o te hua recombination).
te āhuahanga i whakamahia