# Sun

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Note that this page has not been updated to reflect the current state of Beanstalk, but is left here as a reference.
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The Sun advances Beanstalk to the next Season through the `sunrise` function in the Season Facet. Every time an hour passes, `sunrise` can be called 1 more time.

The Season Facet has [several subcontracts](https://github.com/BeanstalkFarms/Beanstalk/tree/master/protocol/contracts/beanstalk/sun/SeasonFacet):

* [`Oracle.sol`](https://github.com/BeanstalkFarms/Beanstalk/blob/master/protocol/contracts/farm/facets/SeasonFacet/Oracle.sol) -> Calculates the time weighted average number of Beans that Bean is above/below its value peg in all pools on the [Oracle Whitelist](https://docs.bean.money/farm/sun#oracle-whitelist).
* [`Weather.sol`](https://github.com/BeanstalkFarms/Beanstalk/blob/master/protocol/contracts/farm/facets/SeasonFacet/Weather.sol) -> Changes the Max Temperature (interest rate) depending on the Bean price, debt level and demand for Soil.
* [`Sun.sol`](https://github.com/BeanstalkFarms/Beanstalk/blob/master/protocol/contracts/farm/facets/SeasonFacet/Sun.sol) -> Sets the Soil for the next Season and mints new Beans if `Oracle` returns `deltaB > 0` and distributes them as follows:
  * Up to 1/3 to Active Fertilizer holders (see [Barn](https://docs.bean.money/developers/protocol/barn));
  * Up to 1/2 of the remaining amount to Pod holders (see [Field](https://docs.bean.money/developers/protocol/field)); and
  * The rest to Stalkholders in the Silo (see [Silo](https://docs.bean.money/developers/protocol/silo)).

`sunrise` does the following steps:

1. Increments the Season number;
2. Calls `Oracle` to get `deltaB`;
3. Calls `Weather` to adjust the Max Temperature and checks for Rain and Season of Plenty;
4. Calls `Sun` to set the Soil and mint Beans if `deltaB > 0`; and
5. Pays `msg.sender` Beans for paying the transaction fee associated with calling the function.

{% hint style="warning" %}
In the Beanstalk ecosystem,

* **Rain** is referred to as **Oversaturation**; and
* **Season of Plenty** is referred to as **Flood**.

See [Terminology Discrepancies](https://docs.bean.money/developers/misc/terminology-discrepancies).
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