Universe Sandbox Wiki

The Fusion Power property of an object represents the rate that energy from internal fusion is added to the object over time. Fusion Power is a read-only property that is continually calculated by Universe Sandbox. Fusion Power is zero only greater than zero for planets and stars with masses larger than 13 Jupiter masses.

Property Details[]


For Planetary Body object, the Fusion Power property is located in the Energy Flow section of the object's Surface tab, when the Energy Absorption Rate property is expanded. For Stars, Black Holes, Fragments, and Human-Scale Objects, the Fusion Power property is located in the Temperature tab.


Fusion Power can be viewed using the following units:

  • Solar luminosity (L star) = 3.846×1026 W
  • Watts (W) is the SI unit for luminosity.

Simulation Effects[]


Fusion Power is one of several sources of energy that can increase an object's Average Temperature or Surface Temperature.