What area of study does Eddington number and Arthur Eddington have in common?
Eddington number: In astrophysics, the Eddington number, "N", is the number of protons in the observable universe. Arthur Eddington: Sir Arthur Stanley Eddington (28 December 1882 – 22 November 1944) was an English astronomer, physicist, and mathematician of the early 20th century who did his greatest work in astrophysics.
astrophysics