Life in outer space presents many environmental challenges as there is no atmosphere, extreme temperatures, and meteoroids pose a risk. The human body also faces difficulties without oxygen, as special respiratory equipment is required outside a spaceship or suffocation can occur. Radiation and diseases can also significantly impact the immune system so protective shielding and medicines are necessary. Muscles also weaken in space without exercise countermeasures. Proper clothing like space suits, helmets, and boots are needed along with regular exercise to stay healthy in the unforgiving environment of outer space.