Astronauts Aspect 2
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Astronauts Aspect 2
Health Risks Of Space
Curated by Sean Burkey
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Race to Mars : Known effects of long-term space flights on the human body

Sean Burkey's comment, March 13, 2013 11:15 PM
1) On Earth, the cardiovascular system circulates blood throughout the body, working against gravity to prevent blood from gathering in the legs and bringing the blood to the brain. In microgravity the system does not work nearly as hard triggering a fluid shift. As fluids move up from the lower body to the waist,the heart rate increases and blood pressure rises. Astronauts experience puffy faces, headaches, nasal congestion and skinny "bird" legs as a result.
Sean Burkey's comment, March 13, 2013 11:21 PM
2) Without gravity, everything in space floats as no force is acting on it.There is no need for astronauts to stand, walk, or even lift in micro-gravity, and their muscles, particularly in their legs, atrophy. Underused, flabby leg muscles affect balance, posture and strength, and can increase the risk of tendinitis and gaining weight. To counter these effects, which also occur to a lesser extent in artificial gravity, and to ensure otherwise sedentary astronauts will be strong enough on arrival to mars, the crews will have to exercise up to 2 hours a day to counter the effects of micro-gravity. After they return to earth they will also be put through an extensive program to re-strengthen their muscles.
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Long Stays in Space Mess with Immune System - MedPage Today

Long Stays in Space Mess with Immune System - MedPage Today | Astronauts Aspect 2 |
MedPage Today Long Stays in Space Mess with Immune System MedPage Today Dysregulation of the immune system shown in post-flight data could result in specific clinical health risks -- such as infection, hypersensitivity, autoimmunity, and cancer --...
Sean Burkey's comment, March 13, 2013 10:26 PM
1) A study reports that longer stays in space may affect your immune system. Astronauts who have spent 6 months or more in outer space experience a lower T-cell function and a slower creation of cytokines, the opposite of what is experienced on earth according to Brian Crucian, PHD, of NASA Johnson Space Center in Houston Texas. An affected immune system shown after a flight or mission can result in some certain health risks such as infection, hypersensitivity, autoimmunity, and cancer for crew members who are on longer missions.
Sean Burkey's comment, March 13, 2013 10:39 PM
2) Crucian said that the participants in the study are under multiple number of "simultaneous stressors" that could just explain the unwanted effects on the immune system in space, including but not limited to radiation, isolation, micro-gravity, disrupted circadian rhythms, stress, and increased virulence from microbes. He also added that astronauts "come back sicks, but not at levels different then terrestrially." However the risks that go along with longer periods in space such as a mission to an asteroid or mars may put the astronaut or astronauts at risk for obvious infection or cancer. He said his research could be considered because he didn't view individual stressors in isolation that can affect astronauts in space. However, he noted that follow up research could explain the effects in a lot of these including stress, disrupted circadian rhythm, and isolation but some of these effects are not easily reproduced here on earth if they can be reproduced at all. If testing can isolate the source or sources of immune suppression then researchers could implement countermeasures such as shields, stress relief, or immune system prepping before flight.
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What are the health risks of space travel?

What are the health risks of space travel? | Astronauts Aspect 2 |
To boldly go where no man has gone before could damage more than your just your wallet. Scientists are researching how it could impact on our health too. (RT @BBCNews: What are the health risks of space travel?

Via Susan Andrews
Sean Burkey's comment, March 13, 2013 10:55 PM
1) The most common problem in missions to space have been proven to be motion sickness, fatigue, dehydration, loss of appetite and back pain. During the massive acceleratin and deceleration of space travel it is hard for the heart to pump blood to the brain. "If you have underlying cardiovascular disease that could be exposed," Says Dr Green.
Sean Burkey's comment, March 13, 2013 11:01 PM
2) "At the extremes, some people can tolerate as little as 3g and some as much as 6g. But there is no one simple, convenient thing you can measure to predict their tolerance. it would be great if a GP could test for it." Us researchers have been looking a g-tolerance in sections of the population who could be the space tourists of the future. The American Aerospace Medical Association Commercial Spaceflight Working Group published a document in 2009 stating that most people with "well controlled medical conditions" could withstand the acceleration and deceleration of launching from earth and landing back. Their challenge, Scoot says, is the ability to gather the information on the range of ages and health conditions present - not just young fit individuals - so that spaceflight can judge who can't fly.
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Teacher Comments

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Tami Yaklich's comment, March 21, 2013 10:02 PM
Your info is primarily taken word for word from the original passages. You must paraphrase - put info into your own words!
Tami Yaklich's comment, March 21, 2013 10:02 PM
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NASA - Space Radiation Health Project

NASA - Space Radiation Health Project | Astronauts Aspect 2 |
Sean Burkey's comment, March 13, 2013 10:46 PM
1) An important safety concern for space missions is the health effects of space radiation on the individual astronauts that can risk cancer, cataracts, acute radiation sickness, hereditary effects and damage to the central nervous system. NASA has been trying to develop ground based research to simulate the space radiation environment and analyze the biological effects at a molecular and cellular level. These facilities will help NASA understand and mitigate the effects of radiation on astronauts to ensure the proper dosage to the astronauts on the ISS and to develop advanced shielding for future missions to mars.
Sean Burkey's comment, March 13, 2013 10:52 PM
2) The primary source of radiation in outer space is the Galactic Cosmic Rays (GCR), protons and electrons trapped in the earths magnetic field, and the Solar Particle Events (SPE). The background radiation of GCR permeates inner planetary space and includes 85% of protons, 14% of helium and about 1 % from high-energy (E) and high-charge (Z) ions called HZE particles. Though the HZE particles are less abundant they posses higher ionizing power with the greater chance of inducing radiation damage.
Scooped by Sean Burkey! - Future Astronauts May Be Exposed to Alzheimer's ... - Future Astronauts May Be Exposed to Alzheimer's ... | Astronauts Aspect 2 |
Mouse study suggests longer-range space travel could pose radiation hazard. Future Astronauts May Be Exposed to Alzheimer's Risk Factor. WEDNESDAY, Jan. 2 (HealthDay News) -- As NASA sets the stage for increasingly ...
Sean Burkey's comment, March 13, 2013 11:08 PM
1) As NASA prepares the stage for increasingly ambitious trips into space, new research highlights the difficulty of long space flights: Alzheimer's disease. According to a new animal study published in Dec. 31 issue PLoS ONE, The cosmic radiation faced by those traveling in space has the potential to onset the neurological disease. "Galactic cosmic radiation poses a significant threat to future astronauts," senior study author Dr. M. Kerry O'Banion, a Professor in the University of Rochester Medical Center's department of neurobiology and anatomy, said in a URMC news release.
Sean Burkey's comment, March 13, 2013 11:11 PM
2) "The possibility that radiation exposure in space may give rise to health problems such as cancer has long been recognized," he added. "However, this study shows for the first time that exposure to radiation levels equivalent to a mission to Mars could produce cognitive [mental] problems and speed up changes in the brain that are associated with Alzheimer's disease." The authors point out that here on earth there is a magnetic field here to protect us from galactic radiation while in space there is nothing between you and the harmful rays. For the most, the bombardment is low enough level that short term missions are not overly concerning, the researchers say. The picture changes when thinking about longer trips such as a mission to mars currently planned for 2035 and predicted to take about three years round trip.