Space is nearly void of all matter, that is, a hard vacuum. There is no air to speak of that can support life or provide heating or cooling conduction and convection. Temperature extremes for the ISS range from –250oF on the dark side to 250oF in sunlight requiring temperature control systems. Getting to space is no easy ride requiring a rocket launch that imposes large acceleration and vibration forces to the spacecraft. The spacecraft must provide for its own power using on board energy storage, some form of fuel and or solar panels. Radiation levels are high outside earth’s atmosphere causing degradation to the spacecraft. Space debris and meteoroids must be avoided. Low orbits must account for atmospheric drag else succumb to eventual reentry.