Alexis Claude Clairaut was a French mathematician, astronomer, and physicist. He was a prominent Newtonian whose work helped to establish the validity of the principles and results that Sir Isaac Newt
Alexis Claude Clairaut
Théorie de la Figure de la Terre, tirée des Principes de l’Hydrostatique, 1743
Théorie de la Lune & Tables de la Lune, 1765
1743 copy of "Théorie de la Figure de la Terre, tirée des Principes de l’Hydrostatique"
Philosophiæ Naturalis Principia Mathematica, often called simply the Principia, is a book by Sir Isaac Newton that expounds Newton's laws of motion and his law of universal gravitation.
Portrait of Sir Isaac Newton (1643–1727), author of the Principia, by Godfrey Kneller (1689)
Newton's own first edition copy of his Principia, with handwritten corrections for the second edition
Titlepage and frontispiece of the third edition, London, 1726 (John Rylands Library, Manchester)
Nicolaus Copernicus (1473–1543) formulated a heliocentric model of the universe.