1011
(100000000000; short scale: one hundred billion; long scale: hundred thousand million, or hundred milliard)
- BioMed — Neurons in the brain: approximately 1011 neurons in the human brain
- Paleodemography: approximately 1.06 × 1011 individuals of Homo sapiens have lived since speciation (40% of this figure are babies who did not live beyond their first year) (see world population).
- Astronomy — stars in our galaxy: approximately 4×1011 stars in the Milky Way galaxy (Often the figure 1×1011 is quoted in error; that is the total mass of the galaxy in solar masses. However, the total number of stars in the galaxy is 4×1011 because 73% of the stars in the galaxy are red dwarves, which have a much smaller mass than the Sun.)
Read more about this topic: Orders Of Magnitude (numbers)