At that time Ernest Brown was a member of the astronomy department and Brown 's work on the Moon was an important ingredient of Eckert's later work. Eckert had joined the Faculty at Columbia University in 1926 and later he became professor there.
Sa panahon na Ernest Brown ay isang miyembro ng astronomy, departamento at Brown 's trabaho sa Buwan ay isang mahalagang sangkap ng Eckert's mamaya sa trabaho. Eckert had sumali sa mga Faculty sa Columbia University sa 1926 at mamaya siya ay naging propesor doon.