# sun (celestial)

big star that provides light for the world

- Computed level: L21 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: sun

## Emergence
**Emerges from:** [matter](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-matter.substance), [energy](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-energy.capacity), [big](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-big.size), [light](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-light.visual), [provide](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-provide.supply), [star](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-star.celestial), [world](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-world.place)

**Through:** matter and energy interact to provide light

**Novel properties:**
- celestial light source
- sustained radiant output
- gravitational center

## Examples
- The Sun fuses about 600 million tons of hydrogen per second in its core, emitting light and heat that sustain Earth's climate and life. *(astronomy)*
- Solar panels on the International Space Station convert sunlight into electricity, powering all onboard systems continuously. *(engineering)*
- Photosynthesis in cyanobacteria uses sunlight to split water and produce oxygen, a process detectable in Earth's atmosphere since the Great Oxidation Event. *(biology)*

## Used by
- [yellow](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-yellow.color) (L22)

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