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Times (in seconds)

8.6×104      Earth rotation time 

1.6×109      Time between Milky Way supernovae 

  3×1013     Time for evolution of a species 

7.3×1015     Orbit time for sun around galaxy center 

  6×1016     Time for galaxy to cross a cluster 

1.1×1017     Primeval slime to man time 

1.5×1017     Age of Earth and Sun 

1.5×1017     Uranium-238 half-life 

  3×1017     Sun lifetime  

3.8×1017     Rough age of the Milky Way 

  4×1017     Rough age of 47 Tucanae 

4.1×1017     Age of the universe 

Jose Wudka