What feature of Project Gemini missions was encapsulated by the translation 'twins'?

Answer

The dual-pilot nature of the missions.

Project Gemini was named after the Latin word meaning 'twins' precisely because the missions utilized two-person crews. This crew size was intentional, as the program served as a crucial developmental phase between the single-astronaut flights conducted under Project Mercury and the complex, multi-person missions required for the subsequent Apollo effort to reach the Moon. The name perfectly captured the essential structural characteristic of those intermediate flights.

What feature of Project Gemini missions was encapsulated by the translation 'twins'?
NASAmythologyApollospace programArtemis