David Lasser

astrogation n.	1931 D. Lasser Conquest of Space xiii. 207 In interplanetary travel we must develop an exact science of three-dimensional astrogation through the heavens.
astrogator n.	1931 D. Lasser The Conquest of Space 211 Surely a complete faith in the laws of mathematics and astronomy must be the first requisite of the interplanetary astrogator.