Why Was Newton's Principia Important?

The Principia states Newton's laws of motion, forming the foundation of classical mechanics; Newton's law of universal gravitation; and a derivation of Kepler's laws of planetary motion (which Kepler first obtained empirically).

Why is Newton's Principia so important?

In Principia, its full title is the Mathematical Principles of Natural Philosophy, Newton lays out his laws of motion, law of universal gravitation and an extension of Kepler's laws of planetary motion. It is a book that helped define the Age of Reason and it is Newton's most celebrated achievement.

What was the purpose of the Principia?

Principia was the name given to ESA astronaut Tim Peake's six-month mission on the International Space Station to maintain the weightless research laboratory and run scientific experiments for hundreds of researchers on Earth that took place from December 2015 to June 2016.