Solar System Simulator
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With the view focused: Space pauses, N steps while paused, R restarts, V switches scale, F frames the system, B frames the body, A toggles rotation, G grid, H labels, C cycles bodies, brackets change speed. Tab leaves the view.

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— · Downloading simulator…

Waiting for simulation state.

Playback and scene

Find a body

Find a body

Small moons live in their planet's scene: switch the scene first, or open a moon from the catalog.

View

View

Illustrative scale enlarges bodies and spreads close moons; real scale uses physical sizes. Views never change the physics.

Keys

Space
pause or resume
N
one step while paused
R
restart
[ ]
slower, faster
C 1–0
cycle or pick bodies
F B
frame system, frame body
V A
scale, camera rotation
T X G H
trails, vectors, grid, labels
Wheel, drag
zoom, orbit

Keys work while the view has focus. Tab moves through the controls.

Data

Measurements and experiments

Numbers
Time
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Achieved speed
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Pending time
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Integrator
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Energy
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Energy change
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Momentum
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Angular momentum
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Acceleration
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Specific energy
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Position
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Velocity
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Magnification
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Camera
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Gravity sources at —
SourceAccelerationShareX, Y, Z (m/s²)
Choose small bodies

All values are SI and come from the C runtime. How the model works.