Answer:
1) Capable of withstanding the extreme conditions of space: Spacecraft must be designed and constructed to withstand the harsh conditions of space, including extreme temperatures, vacuum, radiation, and more. The materials used in spacecraft must be durable and able to withstand the rigors of spaceflight.
2) Safety systems: Spacecraft must have safety systems in place to protect the crew in case of emergencies or malfunctions, including escape systems and redundant systems.
3) Navigation and guidance systems: Spacecraft must have accurate navigation and guidance systems that can determine the vehicle's position in space.
4) Communication systems: Spacecraft must have reliable communication systems that allow the crew to communicate with mission control on Earth and with other spacecraft and satellites in space.
5) Life support systems: Spacecraft must be equipped with life support systems to sustain the crew during the mission such as systems for providing oxygen, water, and food, as well as waste management systems.