for 45 days on a simulated mission, with cameras and scientists monitoring their every move. this is nasa's human exploration research analog — hera for short. inside the module, the crew is poked and prodded in different psychological experiments, from sleep deprivation to diminished privacy, all to fine—tune a critical component that could make or break any future mission to mars — the humans inside the spacecraft. the primary purpose of hera is to learn about the effects of isolation and confinement