**5. Conclusion**

The unpredictability of solar behavior is being anticipated and compensated for with large margins for error, where no error is accepted. Models of GCR are being improved to provide more precise calculations of doses and associated risk estimations. New technologies, experiments, measurements, materials, and simulation models are being developed and tested. Observational missions, such as those to Lagrange points (e.g. ESA missions [46] and NASA's DSCOVR mission [47]) are aimed at providing fast capabilities of forecasting and alerting. All these elements make an intellectual playground for radiation protection engineers and scientists to make a safe ground for living on the Moon.

Guided by the best practices and prioritizing human comfort and well-being, the specialists on Earth will be making crucial choices for those who will go to the Moon. Under the assumption that habitats are to remain highly effective and functional for several astronaut generations to come, global and diversified efforts are required to design, qualify and supervise their construction. Habitat construction working groups are expected to incorporate wide research expertise, originating from fields such as radiobiology, medicine, aerospace engineering, mining, construction, architecture, material sciences, etc. In cooperation, such groups are better equipped to challenge the stressors of the lunar environment.
