Example image of eyePlorer eyePlorer map for 'Geometrized unit system': Gravitational constant Natural units Speed of light Units of measurement Physical constant Boltzmann constant Coulomb's law Planck constant Planck units General relativity Physics Special relativity Physical quantity Black hole Schwarzschild radius Particle physics Physical cosmology Einstein field equations Einstein–Hilbert action Friedmann equations Newton's law of universal gravitation Poisson's equation International System of Units Length Light-second Second Four-momentum Mass Momentum Sun Einstein tensor Sectional curvature Stress-energy tensor Geodesic curvature Acceleration Observation Spacetime World line Electromagnetic tensor Dimensionless quantity Slope Velocity Electromagnetic four-potential Four-current Electric charge Magnitude (mathematics) Minkowski space Angular momentum P-vector Moment (physics)