Simulations with animal models meant to mirror galactic cosmic radiation exposure to astronauts are raising red flags for investigators at Georgetown University Medical Center (GUMC) about the health of astronauts during long voyages, such as to Mars.
Their most recent study, published in the Proceedings of the National Academy of Sciences (PNAS), suggests that deep space bombardment by galactic cosmic radiation (GCR) could significantly damage gastrointestinal (GI) tissue leading to long-term functional alterations. The study also raises concern about high risk of tumor development in the stomach and colon.
Human deep space travel has to be rapid. The longer the travel time, the more physiological damage. That's it in a nutshell. To read more, click here.