# track (path)

a line that is where motion repeats in a place

- Computed level: L13 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: track  ·  Arena: track

## Emergence
**Emerges from:** [line](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-line.geometric), [motion](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-motion.movement), [repeats](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-repeats.action), [space](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-space.extent)

**Through:** motion repeats in a place and together is a line

**Novel properties:**
- repeated trajectory
- spatiotemporal pattern

## Examples
- The Moon follows Earth in a nearly circular path 384,400 km wide, completing an orbit every 27.3 days. *(astronomy)*
- The Appalachian Trail stretches 3,500 km from Georgia to Maine, worn by generations of hikers repeating the route. *(geography)*
- Electrons in a superconducting loop move without resistance, tracing the same microscopic path billions of times per second. *(physics)*

## Used by
- [doubt](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-doubt.epistemic) (L15)
- [river](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-river.watercourse) (L15)
- [tour](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-tour.travel) (L14)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-track.path*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-track.path.json*  
*Every definition provably resolves to space, time, energy and pattern.*