How and why do we control heat on a spacecraft?
Stress happens when pressure is put on the molecules in something that is solid. This pressure can either push together the molecules or pull them apart. Stress caused by molecules being pushed together is called compression. Stress caused by molecules being pulled apart is called tension.
The pressure can come from outside or inside the solid. Weight on the solid can be an external cause of stress. Thermal expansion or contraction can cause stress inside the solid.
What could go wrong on DS1 if it gets too cold?
What could go wrong on DS1 if there's too much heat?
What is heat balance?