Hi, I'm asking a somewhat boring question. I'm trying to understand how heat would transfer if an astronaut were to be so unlucky as to be stranded in space. I know that heat generally transfer in three ways: conduction, convection, and radiation. If I assume the space suit is designed not to conduct heat from the human body, that eliminates one method. And if i assume space to be mostly empty, convection is also eliminated. So the only possibility is through radiating it out of the body. My question then is, how long before his body reaches the temperature of space (nearly absolute zero)? Will he radiate so much heat out through his suit that it kills him in mere hours and his body hits nearly absolute zero shortly after? Will his suit bounce much of the radiation, and therefor he would die or thirst and hunger, before slowly radiating all the remaining heat out; making the time span a few weeks or months? Or something else? Also, would light from the sun be enough to keep the astronaut warm in his suit? Thanks in advance!