How Big Is A Googolplex?

How Big Is A Googolplex?

A common estimate of the number of particles in the observable universe is 10 to the power of 80-less than a googol, and less than the number of zeroes in a googolplex. (Admittedly, this estimate does not include photons and dark matter.) Carl Sagan once said that writing out googolplex would be impossible, because the known universe simply doesn't have enough space.

07:01

Key Facts In This Video

  • 1

    A googol is 10 raised to the power of 100—in other words, a 1 with 100 zeroes after it. (0:33)

  • 2

    A googolplex is 10 raised to the power of googol. (2:53)

  • 3

    A universe that was a googolplex meters across would likely contain repeated versions of yourself. (3:56)

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