How is outer empty space temperature so cold?
The property we refer to as “temperature” is a measurement of molecular motion– most heat comes from molecular collisions producing friction. In outer space there is very little matter. Fewer molecules means fewer collisions means less friction means colder temperatures. HOWEVER the common belief that you would *feel* cold if you were floating naked in space is purely science fiction. Because there is no air around you, there is no convection and therefore it is difficult for your natural heat to leave your body. In fact, your core temperature would probably go *up* from the radiation of nearby stars. You’d still suffocate though.
