NASA Twins Study

Overview

The NASA Twins Study compared astronaut Scott Kelly during a year aboard the ISS with his identical twin on Earth, advancing understanding of how spaceflight affects the human body.

Knowledge connections

• Science supported byInternational Space Station

Sources

Facts on this topic will be cited from these primary and reference sources.

• NASANational Aeronautics and Space Administration

  Mission data, planetary science, space telescopes, and public-domain imagery.

  Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.