■Abstract: As space tourism has launched, the number of non-English speaking space travelers would increase. Owing to the limited seating capacity, an interpreter may not be able to travel with them. When this happens, the greatest problem would be that of communication. In this study, we introduce the space version of hand signals to enable passengers to communicate with each other. We believe these hand signals, as they become more common, will be useful for people who will live in outer space or on the moon in the future.