Newton was a very famous scientist, but he ignored a hypothesis given to him by his friend Fatio. The laws of motion are mathematically derived and predict spherical form on the field of gravity. However, today we have found the that very close to a not perfect sphere the field of gravity is not a perfect sphere. Fatio’s model could have explained this fact.
So, Newton made a mistake, and it is common that a famous scientist can get acceptance for wrong ideas.
See below ________ John-Erik