A Journey Through Time
From Greek celestial spheres to Einstein's field equations, 2500 years of gravitational physics told through interactive simulations you can explore and modify.
Each topic is paired with visualizations, simulations, and open source code. Play with parameters, see what changes, read the math behind it.
Interactive
Adjust parameters and see how physics changes in real time
Real Physics
Actual equations, not hand-waving. From Kepler's laws to Einstein's field equations
Open Source
Every simulation's code is available. Read it, fork it, improve it
Explore the Timeline
From ancient cosmology to numerical relativity, one chapter at a time.
Newton and Universal Gravitation
1642 - 1727
The force that governs apples and planets: modern physics is born.
Limits of Newtonian Gravity
1859 - 1905
Mercury disobeys, and light travels too fast.
Special Relativity
1905-1908
Einstein destroys absolute time and prepares the revolution.
Birth of General Relativity
1854-1915
The mathematical revolution that reimagined gravity as geometry.
Modern Differential Geometry
Mathematical Foundations
Fiber bundles, connections, curvature tensors: the modern geometric framework that unifies GR and gauge theories.
Verifications and Renaissance
1919-1975
The eclipse that made Einstein famous, and the rebirth of relativity.
Black Holes
1916 - 2022
From Schwarzschild's mathematical solution to the first photograph of a black hole shadow - the journey of the most extreme objects in the universe.
Gravitational Waves
1916-2025
100 years after Einstein predicted ripples in spacetime, LIGO finally heard two black holes collide.
Cosmology
1917 - Present
How General Relativity revealed the history, structure, and fate of the entire universe—from the Big Bang to the accelerating expansion.
Numerical Relativity
1959 - Present
For forty years, physicists failed to simulate black holes colliding. Then, in 2005, two breakthroughs cracked the problem—just in time for LIGO.
Quantum Gravity
1930 - Present
The quest to unify General Relativity with Quantum Mechanics remains physics' greatest unsolved problem. From Wheeler-DeWitt to string theory and loop quantum gravity.
Wormholes and ER=EPR
1935 - Present
From Einstein-Rosen bridges to the mind-bending ER=EPR conjecture: are entangled particles connected by microscopic wormholes?
Advanced Mathematics
Fiber bundles, differential forms, and the Hilbert action for those who want more.