SETI Institute for Educators

r2 instrumet

Expose-R2 Photochemistry on the Space Station

After 18 months mounted externally on the International Space Station Zvezda module, the European Space Agency Expose-R2 Photochemistry on the Space Station (PSS) experiment was retrieved by cosmonauts during a February spacewalk. The PSS experiment investigated the evolution of organic compounds upon exposure to space radiation.
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