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The solar system, on any day.

Eight planets, their main moons and the asteroid belt, at their real positions. Drag the slider through time. Tap a planet to see how long a radio signal from Earth takes to get there.

Positions come from standard orbit tables, good to a fraction of a degree for a few years. Moons are drawn far too big and close to their planet so you can see them. In Whole system the distances are squeezed so Neptune fits; in Inner they are true to scale. The story's ship path is on the ship tracker.