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ISS year long mission

Research project of the health effects of being in space long term

The ISS year-long mission, also called the One-Year Mission, was an 11-month-long scientific research project aboard the International Space Station, which studied the health effects of long-term spaceflight. As part of the mission, the NASA Twins Study was conducted.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

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One-Year Crew Mission commemorative poster
Photo: NASA, Public domain, via Wikimedia Commons3

The ISS year-long mission, also called the One-Year Mission, was an 11-month-long scientific research project aboard the International Space Station, which studied the health effects of long-term spaceflight. As part of the mission, the NASA Twins Study was conducted.2

Sources

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