An astronaut is a person trained, equipped, and deployed by a human spaceflight program to serve as a commander or crew member aboard a spacecraft. Although generally reserved for professional space travelers, the term is sometimes applied to anyone who travels into space, including scientists, politicians, journalists, and tourists.
Human spaceflight is spaceflight with a crew or passengers aboard a spacecraft, often with the spacecraft being operated directly by the onboard human crew. Spacecraft can also be remotely operated from ground stations on Earth, or autonomously, without any direct human involvement. People trained for spaceflight are called astronauts, cosmonauts (Russian), or taikonauts (Chinese); and non-professionals are referred to as spaceflight participants or spacefarers.
Space exploration is the use of astronomy and space technology to explore outer space. While the exploration of space is currently carried out mainly by astronomers with telescopes, its physical exploration is conducted both by uncrewed robotic space probes and human spaceflight. Space exploration, like its classical form astronomy, is one of the main sources for space science.
Dafydd "David" Rhys Williams is a Canadian physician, public speaker, author and retired CSA astronaut. Williams was a mission specialist on two Space Shuttle missions. His first spaceflight, STS-90 in 1998, was a 16-day mission aboard Space Shuttle Columbia dedicated to neuroscience research. His second flight, STS-118 in August 2007, was flown by Space Shuttle Endeavour to the International Space Station. During that mission he performed three spacewalks, becoming the third Canadian to perform a spacewalk and setting a Canadian record for total number of spacewalks. These spacewalks combined for a total duration of 17 hours and 47 minutes.
Chiaki Mukai is a Japanese physician and JAXA astronaut. She was the first Japanese woman in space, the first Japanese citizen to have two spaceflights, and the first Asian woman in space. Both were Space Shuttle missions; her first was STS-65 aboard Space Shuttle Columbia in July 1994, which was a Spacelab mission. Her second spaceflight was STS-95 aboard Space Shuttle Discovery in 1998. In total she has spent 23 days in space.
The effects of spaceflight on the human body are complex and largely harmful over both short and long term. Significant adverse effects of long-term weightlessness include muscle atrophy and deterioration of the skeleton. Other significant effects include a slowing of cardiovascular system functions, decreased production of red blood cells, balance disorders, eyesight disorders and changes in the immune system. Additional symptoms include fluid redistribution, loss of body mass, nasal congestion, sleep disturbance, and excess flatulence. Overall, NASA refers to the various deleterious effects of spaceflight on the human body by the acronym RIDGE.
Space medicine is a specialized field, which developed from Aerospace medicine, that focuses on the acute medical care of astronauts and spaceflight participants. The spaceflight environment poses many unique stressors to the human body, including G forces, microgravity, unusual atmospheres such as low pressure or high carbon dioxide, and space radiation. Space medicine applies emergency medicine, acute care medicine, critical care medicine, interventional radiology, radiology, austere medicine, and toxicology perspectives treat and prepare for medical problems in space. This expertise is then used to inform vehicle systems design to minimize the risk to human health and performance while meeting mission objectives.
Thomas Henry Marshburn is an American physician and a former NASA astronaut. He is a veteran of three spaceflights to the International Space Station and holds the record for the oldest person to perform a spacewalk at 61 years old.
Michael Reed Barratt is an American physician and a NASA astronaut. Specializing in aerospace medicine, he served as a flight surgeon for NASA before his selection as an astronaut, and has played a role in developing NASA's space medicine programs for both the Shuttle-Mir Program and International Space Station. His first spaceflight was a long-duration mission to the International Space Station, as a flight engineer in the Expedition 19 and 20 crew. In March 2011, Barratt completed his second spaceflight as a crew member of STS-133. Barratt will pilot the SpaceX Crew-8 mission in spring 2024.
Astronautical hygiene evaluates, and mitigates, hazards and health risks to those working in low-gravity environments. The discipline of astronautical hygiene includes such topics as the use and maintenance of life support systems, the risks of the extravehicular activity, the risks of exposure to chemicals or radiation, the characterization of hazards, human factor issues, and the development of risk management strategies. Astronautical hygiene works side by side with space medicine to ensure that astronauts are healthy and safe when working in space.
The National Space Biomedical Research Institute (NSBRI) was a NASA-funded consortium of institutions studying the health risks related to long-duration spaceflight and developing solutions to reduce those risks. The NSBRI was founded in 1997 through a NASA Cooperative Agreement. The founding director was Laurence R. Young of MIT. NSBRI's 16,400-square-foot headquarters facility was located in the BioScience Research Collaborative in Houston, Texas. The Institute shared the facility with Baylor College of Medicine's Center for Space Medicine. The official opening was held March 19, 2012.
Timothy J. Broderick, F.A.C.S., is Professor of Surgery and Biomedical Engineering at the University of Cincinnati, where he has served on the faculty since 2003. He also serves as Chief of the Division of Gastrointestinal and Endocrine Surgery and is Director of the Advanced Center for Telemedicine and Surgical Innovation (ACTSI). He has flown on the NASA KC-135 parabolic laboratory and dived in the NASA Extreme Environment Mission Operations (NEEMO) program to develop advanced surgical technologies for long duration space flight.
Space nursing is a specialty that works with astronauts to determine medical fitness for their missions, equips NASA team members to handle emergencies in orbit and researches the effects of space travel on the human body. The career got its start during the space race of the 1960s and has grown—both in terms of number of people in the field and knowledge base—ever since. Research conducted by medical professionals in the aeronautics field has led to many breakthroughs in disease treatment of earthbound patients and the discipline continually develops new technology to make space medicine more effective.
Astronaut training describes the complex process of preparing astronauts in regions around the world for their space missions before, during and after the flight, which includes medical tests, physical training, extra-vehicular activity (EVA) training, procedure training, rehabilitation process, as well as training on experiments they will accomplish during their stay in space.
It is inevitable that medical conditions of varying complexity, severity and emergency will occur during spaceflight missions with human participants. Different levels of care are required depending on the problem, available resources and time required to return to Earth.
Illnesses and injuries during space missions are a range of medical conditions and injuries that may occur during space flights. Some of these medical conditions occur due to the changes withstood by the human body during space flight itself, while others are injuries that could have occurred on Earth's surface. A non-exhaustive list of these conditions and their probability of occurrence can be found in the following sources:
Since its establishment in 1958, NASA has conducted research on a range of topics. Because of its unique structure, work happens at various field centers and different research areas are concentrated in those centers. Depending on the technology, hardware and expertise needed, research may be conducted across a range of centers.
Inspiration4 was a 2021 human spaceflight operated by SpaceX on behalf of Shift4 Payments CEO Jared Isaacman. The mission launched the Crew Dragon Resilience on 16 September 2021 at 00:02:56 UTC from Kennedy Space Center's Launch Complex 39A atop a Falcon 9 launch vehicle. It placed the Dragon capsule into low Earth orbit with mission termination on 18 September 2021 at 23:06:49 UTC when Resilience splashed down in the Atlantic Ocean.
Mark J. Shelhamer is an American human spaceflight researcher specializing in neurovestibular adaptation to space flight., and former chief scientist of NASA's Human Research Program. He is a Professor of Otolaryngology - Head and Neck Surgery at the Johns Hopkins School of Medicine, director of the Human Spaceflight Lab at Johns Hopkins, and director and founder of the Bioastronautics@Hopkins initiative. He is also an adjunct associate professor at George Washington University School of Medicine and Health Sciences. He has published over 70 scientific papers and is the author of Nonlinear Dynamics in Physiology: A State-Space Approach. He holds several patents for various vestibular assessment devices.
Carolyn Leach Huntoon is an American scientist and former government official. She was the director of the Johnson Space Center in Houston, Texas, a position which she held from 1994 to 1996, and was the first woman in the role. She was an assistant secretary at the Department of Energy from 1999 to 2001.
