When to Use Orbital Velocity 3D Explorer - Best Sessions and Limits
Open the Orbital Velocity 3D Explorer when you need Vis-viva speed along an eccentric ellipse - v = sqrt(GM(2/r - 1/a)) with Mercury ~47.36, Earth ~29.78, and Neptune ~5.43 km/s mean-speed presets - without an n-body propagator or rocket delta-v planner.
A five-minute classroom demo
A five-minute classroom demo starts when you open Orbital Velocity 3D Explorer on the Earth preset, drag eccentricity up, and watch the yellow velocity arrow grow near green periapsis and shrink near red apoapsis - clearer than writing Vis-viva alone on a board.
Inner versus outer mean speeds in one panel
Inner versus outer mean-speed literacy stays readable when you switch Mercury (~47.36 km/s) then Neptune (~5.43 km/s) and keep the facts panel live km/s readout visible. Orbit size is scaled for teaching readability; the panel numbers are published mean speeds.
Sessions Orbital Velocity 3D Explorer does not fit
Sessions Orbital Velocity 3D Explorer does not fit are full n-body gravity integrations, live JPL ephemeris fetches, or launch delta-v budgets. Use Kepler Orbits 3D for ellipse laws or Escape Velocity 3D for escape trajectories. Walk the controls in the Orbital Velocity 3D Explorer step-by-step guide.
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