The best estimate of the age of the universe as of 2013 is 13.798 ± 0.037 billion years but due to the expansion of space humans are observing objects that were originally much closer but are now considerably farther away ( as defined in terms of cosmological proper distance , which is equal to the comoving distance at the present time ) than a static 13.8 billion light-years distance .
Due to the expansion of the universe humans are observing objects that were originally much closer but are now considerably farther away ( as defined in terms of cosmological proper distance , which is equal to the comoving distance at the present time ) than a static 13.8 billion light-years distance .