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To help compare orders of magnitude of different times this page lists times between 109 seconds and 1010 seconds (32 years and 320 years). See also times of other orders of magnitude Shorter times 63 years -- half-life of titanium-44 75 years -- average human life span 84 years, 3 days, 15.66 hours -- one orbit of Uranus 100 years -- one century = 3.16 × 109 seconds 165 years -- one orbit of Neptune 247.7 years -- one orbit of Pluto 288 years -- one orbit of Quaoar Longer times