About
American astronomer known for being a believer of the Chamberlin-Moulton planetesimal hypothesis, which says planets formed from smaller parts.
Before Fame
He finished his graduate studies at the University of Chicago, receiving a Ph.D. in 1899.
Trivia
The moon crater 'Moulton' is named in his honor.
Family Life
He was born and raised in Le Roy, Michigan.
Associated With
He and Edwin Hubble were both famous American astronomers.
