Two-body dynamics
Earth & Moon
A familiar world. A quiet companion. An orbit held together by gravity.
Launch Simulation ↗
CAPTURED IN TUDUNI LABORATORYTHE PHYSICS
A closer look.
Circular orbital speed depends on the combined mass and separation.
v = √(G(M + m) / r)
G is the gravitational constant, M and m are masses, r is separation, c is the speed of light, and b is impact parameter where applicable.
What you can learn
- Explore orbital speed and separation
- Compare the Earth and Moon's physical sizes
- See how changing mass reshapes an orbit
Default bodies
Earth and the Moon
CAPTURED IN TUDUNI LABORATORYCircular initial conditions and Newtonian point-mass forces; tides, lunar phases and precession are not modeled.
Space fabric illustrates gravitational influence; it is not a numerical solution of the full Einstein field equations. Visual sizes can be enlarged independently of physical collision radii.