Editing Energy Radiation Rate

The Energy Radiation Rate represents the total rate at which an object radiates heat energy out into space.. This property is used to [[Temperature Calculation|calculate]] the change in the object's [[Average Surface Temperature|temperature]] over time.

The Energy Radiation Rate is a '''read-only''' property that is continually calculated by Universe Sandbox using the [https://en.wikipedia.org/wiki/Stefan%E2%80%93Boltzmann_law Stefan-Boltzmann law]:
:<math>P_{rad} = \sigma T^4, </math>
where σ is the [https://en.wikipedia.org/wiki/Stefan%E2%80%93Boltzmann_constant Stefan-Boltzmann constant] and ''T'' is the object's Average Surface Temperature.

==Property Details==

===Location===

For [[Planetary Body]] objects, the Energy Radiation Rate property can be found in the Energy Flow section of the [[Surface Tab|Surface]] tab. For [[Star|Stars]], [[Black Hole|Black Holes]], [[Fragment|Fragments]], and [[Human-Scale Object|Human-Scale Objects]], the Energy Radiation Rate property can be found in the [[Temperature Tab|Temperature]] tab.

===Units===

Energy Radiation Rate can be viewed using the following units:
* Solar luminosity (L star) = 3.846×10<sup>26</sup> W
* Watts (W) is the [https://en.wikipedia.org/wiki/International_System_of_Units SI] unit for luminosity.

==Simulation Effects==

===Surface Temperature===

At each simulation [[N-Body_Simulation#Time_Step|time step]], the change in the temperature of each point on the object's surface, Δ''T'', is calculated using the [[Energy Absorption Rate]], ''P<sub>abs</sub>'', the Energy Radiation Rate, ''P<sub>rad</sub>'', the time step, Δ''t'', and the object's [[Surface Heat Capacity]], ''C'', using 
:<math>\Delta T = (P_{abs} - P_{rad})\Delta T / C. </math>


[[Category:Heating]]