An interactive three-dimensional model of the Solar System.
Rotate, zoom and animate the planets while exploring orbital distance,
period, velocity, eccentricity and inclination.
3D Orbit Explorer
Drag to rotate the Solar System, scroll or pinch to zoom, and use the
controls below to change the mathematical representation of the system.
The model uses simplified Keplerian orbital mechanics rather than
real-time planetary ephemerides. Orbital periods, semi-major axes,
eccentricities and approximate inclinations are based on standard
Solar System values.
The planets are deliberately enlarged so that they remain visible.
Distance and planet-size scales can therefore be controlled separately.
This is a visualisation of the mathematics, not a photographic scale model.
Mathematics behind the motion
Kepler's third law
T2 = a3
For the simplified Solar System model.
Orbital velocity
v = √(GM/r)
Circular-orbit approximation.
Ellipse
e = 0 → circle
Larger eccentricity produces a more elongated orbit.
Inclination
3D orbit plane
Different planets have slightly different orbital planes.