sentences:  Astronautical hygiene is an applied scientific discipline that requires knowledge and experience of many fields including bioastronautics, space medicine, ergonomics etc.The skills of astronautical hygiene are already being applied for example, to characterise moon dust and design the measures to mitigate exposure during lunar exploration, to develop accurate chemical monitoring techniques and use the results in the setting SMACs.Of particular interest from a biological perspective are the effects of reduced gravitational force felt by inhabitants of spacecraft.