Astronauts will be exposed to increased levels of ionizing radiation on missions outside Earth's protective atmosphere. SRE helps understand how this ionizing radiation affects the human body.

See the risks of human spaceflight that the SRE investigate to help ensure the health and safety of astronauts in low-Earth orbit and beyond.

Meet the team behind SRE, including element managers and scientists who help facilitate research aboard the International Space Station and in simulations on Earth.

Find different ways to collaborate with NASA’s HRP and help us discover how to keep the next generation of space explorers thriving on future missions to the Moon, Mars, and beyond.

Researchers can apply for virtual courses that provide an overview of the space radiation environment and how it impacts human health.

Software that model the space radiation environment is available for download by authorized users.

Samples collected from studies funded by SRE are now available to investigators in the space radiation research community.

THREE is an encyclopedic reference site that explains the space radiation environment and its health risks to humans.

NSRL helps to assess health risks associated with cosmic radiation. To better understand these risks, NASA has teamed with the U.S. Department of Energy to establish this lab. 

SRAG, based at NASA's Johnson Space Center in Houston, works to ensure that the radiation exposure received by astronauts remains below established safety limits.

SRE scientists are working with doctors and researchers across the federal government to help cut the nation’s cancer death rate by at least 50% over the next 25 years.

Watch a webinar about how NASA models the differences between space and terrestrial radiation to assess the risk of astronauts developing cancer from space radiation exposure.