A moving NASA/JPL Horizons ephemeris

Solar System Time Machine

Move a date slider—or press play—to watch planets, small bodies and spacecraft travel through a rolling ephemeris window.

Loading the time machine…

Drag to rotate while paused or playing. The timeline loops continuously.

Cached ephemeris

Time-machine coverage

Playback interpolates between daily Horizons vectors. Logarithmic distances and enlarged bodies keep the scene readable; speed is intentionally accelerated.

Vectors: NASA/JPL Horizons.