Who is Isaac Newton?

1642 (Dec 25) – Born prematurely in Woolsthorpe, Lincolnshire, England. The same year Galileo died, symbolizing a cosmic handoff.
Raised mostly by his grandmother after his mother remarried.
A quiet child who built sundials and mechanical models — already blending observation with invention.

1661 – Enters Trinity College, Cambridge as a subsizar (a student working to pay his tuition).
Studies classical curriculum but independently explores Descartes, Kepler, and Galileo.
Begins keeping a personal notebook, “Quaestiones Quaedam Philosophicae” (Certain Philosophical Questions), marking the start of a lifelong quest for knowledge.

1665–1666 – University closes due to the Great Plague. Newton returns to Woolsthorpe.
- This becomes the “Annus Mirabilis” (Year of Wonders):
  - Invents calculus (though not formally published).
  - Develops foundational ideas on gravity, motion, and optics.
  - Observes an apple fall, leading to thoughts about universal attraction (the apple story, though later embellished, has some basis in truth).
  - Performs experiments with prisms, discovering that white light is composed of colors.

1667 – Returns to Cambridge; elected Fellow of Trinity.
1669 – Becomes Lucasian Professor of Mathematics at age 26.
1672 – Elected to the Royal Society after presenting his reflecting telescope.
1675–1684 – Engages in studies of alchemy and Biblical chronology in secret.
1687 – Publishes Philosophiæ Naturalis Principia Mathematica (“Principia”):
- Defines laws of motion.
- States the law of universal gravitation.
- Establishes a mathematical foundation for the physical universe.
- Becomes one of the most influential works in scientific history.

With the Glorious Revolution, Newton becomes politically active.
1696 – Appointed Warden (later Master) of the Royal Mint.
- Reforms England’s coinage, aggressively pursues counterfeiters.
- Treats crime like science: systematic, relentless.
1703 – Elected President of the Royal Society.

1704 – Publishes Opticks, detailing experiments on light and color.
- More experimental than mathematical, contrasting with Principia.
Engages in bitter priority dispute with Leibniz over the invention of calculus.
Continues exploring alchemy, theology, and Biblical prophecy in secret writings (published posthumously).
1727 (March 20) – Dies in London at age 84.
- Buried with honor in Westminster Abbey, the first scientist to receive such distinction.

Newton’s ideas set the stage for the Enlightenment.
His laws remained unchallenged until Einstein’s relativity.
A paradox of reason and mysticism, Newton spent more time on alchemy and theology than physics — yet changed science forever.
Modern physics, engineering, and astronomy still rest on Newtonian principles — he didn’t just observe the universe; he decoded its grammar.