La terre et la lune forme extérieure et structure interne by P. Puiseux

“La terre et la lune: forme extérieure et structure interne” by P. Puiseux is a scientific publication written in the early 20th century. The book presents an in-depth examination of the physical characteristics and internal structure of the Earth and the Moon, building on historical and contemporary astronomical theories. It aims to provide a comprehensive understanding of how these celestial bodies interact within our solar system. The opening of this work introduces the concept of celestial physics, emphasizing the shift in understanding from ancient to modern perspectives regarding the Earth’s shape and motions. It outlines the historical evolution of thought on the Earth’s figure, starting from Thales to Newton, highlighting significant contributions from various cultures, especially the Greeks, who first engaged with astronomy beyond practical needs. It elucidates how these ideas paved the way for more precise measurements and theories regarding the Earth’s dimensions and movements, setting the stage for deeper explorations into the laws of gravity and celestial mechanics.