Gravity-Dependent Movements: In microgravity, traditional concepts like "up" and "down" become meaningless. Astronauts can move and orient themselves in any direction, floating rather than walking or standing.
Privacy Norms: Spacecraft are very small and densely packed, so personal privacy is limited. Astronauts often share cramped quarters and lack private spaces, something unusual on Earth.
Day-Night Cycle: In low Earth orbit, the International Space Station (ISS) experiences 16 sunrises and sunsets daily, so the usual 24-hour day-night cycle doesn’t apply. Astronauts use scheduled lighting and alarms to regulate their "days."
Cooking and Dining Rules: Cooking methods like frying, baking, or boiling aren’t possible in microgravity. Meals are pre-packaged, rehydrated, or heated, and utensils and packaging are adapted to avoid crumbs or floating liquids.
Weather and Climate: Traditional weather considerations, like rain, wind, and temperature variations, are absent in space. Spacecraft have controlled atmospheres, eliminating the need to plan for weather-related concerns.
Driving and Traffic Rules: In space, there’s no typical traffic system with lanes or stop signs. Movements are carefully coordinated through mission control, and vehicles operate in vast three-dimensional space rather than on fixed roads.
Weight and Mass Handling: "Weight" doesn’t exist in microgravity. Though mass remains constant, objects feel weightless, making the handling and movement of heavy equipment easier in many ways but requiring restraint mechanisms.
Financial Transactions: Currency and cash transactions have no use in space. Basic needs are covered as part of the mission, and there’s no buying or selling between astronauts, as all supplies are pre-planned and provided by the space agency.