
Newton's Principia
by Isaac Newton
- Reading level
- Demanding
- Price
- Free
About the book
"Newton's Principia: The Mathematical Principles of Natural Philosophy" by Isaac Newton is a three-volume work first published in 1687. Written in Latin, it presents Newton's laws of motion and universal gravitation, creating a mathematical foundation for classical mechanics. The work explains planetary motion, estimates celestial masses, accounts for tides and Earth's shape, and addresses comets' orbits. Considered among history's greatest scientific achievements, it transformed scattered observations into systematic sciences of physics and astronomy, fundamentally altering humanity's understanding of the natural world.
- Mechanics
- Celestial mechanics
Updated September 2026. Public domain in the USA. Text and summary from Project Gutenberg eBook #76404. Newton's Principia on Wikipedia.


