Naturally occurring radiation to which astronauts may be exposed come in three main forms: galactcosmic rays (GCRs), charged particles accelerated to high energies by eruptive events at the Sun (solar energetic particles, or SEPs), and highly energetic particles trapped in the inner magnetospheres of the Earth and other magnetized planets. Figure 1 shows the various types of radiation that perv...

Induction of cataracts by occupational exposure in flight crew has been an important topic of interest in aerospace medicine in the past five years, in association with numerous reports of flight-associated disease incidences. Due to numerous confounding variables, it has been difficult to determine if there is increased cataract risk directly caused by interaction with the flight environment, ...

Microgravity (μG) induced orthostatic intolerance (OI) in astronauts is characterized by a marked decrease in cardiac output (CO) in response to an orthostatic stress. Since CO is highly dependent on venous return, alterations in the resistance to venous return (RVR) may be important in contributing to OI. The RVR is directly dependent on arterial compliance (Ca), where aortic compliance (Cao) ...

Just like people on Earth, astronauts in orbit love to read. Now Astronauts Zoom! is part of that reading. The book was launched the International Space Station (ISS), with four Dragon Endeavour spacecraft, for Story Time From Space. After spacecraft’s first launch attempt scrubbed (with countdown nail-bitingly stopped at two minutes before liftoff), rocketed into space March 2, 2023, Read Acro...

background: astronauts will be exposed to both chronic space radiation and acute high doses of energetic radiation of solar particle events in long-term deep space missions. the application of radioprotectors in space missions has basic limitations such as their very short time window as well as their acute toxicity and considerable side effects. the aim of the present study was to investigate ...