One danger that astronauts would face going to the moon, visiting the moon, or returning to Earth is exposure to radiation. The space environment exposes astronauts to high levels of ionizing radiation from cosmic rays and solar flares, which can damage their DNA and increase their risk of developing cancer or other health problems. Additionally, during a moon landing or takeoff, astronauts are exposed to radiation from the lunar surface, which contains radioactive elements such as uranium and thorium. To minimize this risk, spacecraft and spacesuits are designed to provide some protection from radiation, and astronauts are carefully monitored for radiation exposure.