This paper presents the perspective that universe is relative. Theuniverse, which changes according to the observer’s proper time, isdynamic. Generally, the universe expands, but if the observer acceleratesenough, contraction is also possible. The Hubble parameter merelyrepresents that change. If the Hubble parameter is dependent on theproper time, the measurement can only be uncertain. Identifying thefactors that influence the proper time could potentially lead to a moreaccurate measurement of the universe’s age, and it could also offerinsights into the state of the early universe and the causes of theaccelerated expansion observed in the current epoch.