Orbital Mechanics Simulators

Set mass and radius to calculate escape velocity for any celestial body

Explore gravity's effects with this interactive simulator. Visualize orbits, warp spacetime, and build intuition for physics concepts like general relativity.

The classic Hohmann transfer tool: real-time Δv1, Δv2, total Δv, and transfer-time outputs for LEO-to-GEO, Earth-to-Mars, Earth-to-Venus rough sizing. For arbitrary tran…

An intermediate-to-advanced numerical simulator that solves M = E − e sin E via Newton-Raphson. Watch eccentric and true anomalies update every frame with iteration coun…

Visualize all three Kepler laws on a single orbit animation. Vary eccentricity and semi-major axis to see the ellipse shape, constant areal velocity, and T² ∝ a³ relatio…

Simulate planetary orbits with Kepler's Laws. Adjust parameters to visualize elliptical motion, the equal-area law, and verify the harmonic law in real time.

Visualise the transfer orbit that connects two points around a central body.

Design a spiral transfer matched to the \

Simulate gravitational orbits, collisions, and mergers in real time. Explore solar systems, binary stars, and the figure-8 solution with this N-body physics simulator.

An analysis-focused extension showing the vis-viva equation and orbital energy on Chart.js graphs. Vary eccentricity and semi-major axis to inspect v(r) profiles and ene…

Entry-level tool for rocketry and satellite engineering. Manipulate the three orbital elements (a, e, i) against canonical presets. For vis-viva charts and extended anal…

The Earth is not a perfect sphere — the equator bulges by about 21 km, and that flattening (the J2 zonal coefficient, 1.08×10⁻³) makes a satellite's orbital plane preces…

Simulate a Hohmann orbital transfer. Set orbit radii to instantly calculate delta-v, transfer time, and watch an animated spacecraft journey.

Calculate the communications pass time between a polar-orbit Earth-observation satellite and a ground antenna.

Simulate projectile trajectories and orbital mechanics. Adjust velocity to see transitions from suborbital to circular, elliptical, and hyperbolic escape paths.

Design the approach trajectory of a chaser spacecraft to a target satellite for rendezvous and docking.

Visualize satellite orbits in real time. Adjust altitude, inclination, and RAAN. Calculate period, velocity, and coverage.

Simulate gravity assist maneuvers in real-time. Adjust planet mass, velocity, and angle to see orbital changes powered by accurate physics and RK4 integration.

Design a Sun-synchronous orbit — the standard low-Earth orbit for Earth-observation satellites — by matching the J2-driven nodal regression to the Sun's mean motion.

Visualize the three-body problem in real-time. Explore gravitational interactions, periodic orbits, and conserved quantities like energy and angular momentum.

Visualize the tidal bulge created on Earth by differential gravity from the Moon and Sun. Adjust orbital radius and masses to compute the Roche limit, spring tides, and …