A petasecond (Ps) is 1015 seconds, or 1,000,000,000,000,000 seconds. A petasecond is also 3.2x105 years, or 32 million years. In the history of the universe, we have passed by approximately 425 petaseconds, and it takes the sun 7.8125 petaseconds to revolve around the center of the Milky Way. The cat evolved little over 1 petasecond ago, and in 1.25 petaseconds, the continent Australia will collide into Asia. The half-life of niobium-92 is a little bit over a petasecond.

terasecond (32,000 years)<--petasecond-->exasecond (32,000,000,000 years)

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