The European Space Agency has outlined Exposome Signature, a study of how people adapt to extended spaceflight. Its 23 October account describes comparisons between astronauts and Italian Navy submariners, whose confined environment provides an analogue without microgravity or space radiation.
Researchers will examine linked changes involving inflammation, immunity, oxidative stress, metabolism and other biological systems. Samples collected before, during and after missions are intended to show how those processes interact over time, with follow-up extending six months after return.
The work aims to identify useful biological markers and inform future monitoring and countermeasures. It is a description of a research programme, rather than proof of a new treatment or a finding that submarine conditions reproduce every feature of a space mission.
Context
Comparing environments can help distinguish shared stresses from effects specific to spaceflight.
Sources
Original summary based on the sources above, checked for the October 24, 2026 edition. Reference dates are shown separately from the edition date.