Tofte Simulators

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Space flight

The Explorer

How it works, and what it shows: read the note on the blog.

Try next

Wormhole Stations Put a station at every star within 12 light years and see whether you built a time machine.
Closest Approach Sample an asteroid's close pass, then refine it, and see why the closest sample is not the closest approach.
Fusion Nozzle Drag the one unmeasured number the nozzle's mass hangs on and watch it swallow the ship.

Every simulator runs on our own engine and shows its working. The notes on the blog explain how they work.