Tag: weightlessness
The Russians are once again pushing for a one year long mission on ISS, while NASA once again appears unenthusiastic.
The Russians are once again pushing for a year long mission on ISS, while NASA once again appears unenthusiastic.
Though from this article it appears that this time NASA officials are at least considering the idea.
The Russians are once again pushing for a year long mission on ISS, while NASA once again appears unenthusiastic.
Though from this article it appears that this time NASA officials are at least considering the idea.
NASA today announced that recent research on ISS into bone loss due to weightlessness has found that proper exercise and diet can stabilize bone loss.
Good news! NASA today announced that recent research on ISS into bone loss due to weightlessness has found that proper exercise and diet can stabilize bone loss.
Past Russian research on Mir had found that exercise and diet could limit the bone loss, but not stop it entirely. The key difference in this recent work seems to be the use of more sophisticated exercise equipment.
If this research holds up, it eliminates one of the most serious obstacles to interplanetary travel.
Good news! NASA today announced that recent research on ISS into bone loss due to weightlessness has found that proper exercise and diet can stabilize bone loss.
Past Russian research on Mir had found that exercise and diet could limit the bone loss, but not stop it entirely. The key difference in this recent work seems to be the use of more sophisticated exercise equipment.
If this research holds up, it eliminates one of the most serious obstacles to interplanetary travel.
New research suggests that — despite its known bad effects — weightlessness might actually slow the aging process.
New research suggests that — despite its known bad effects — weightlessness might actually slow the aging process.
Don’t jump into that spaceship yet! The research was done on worms, and is to put it mildly very preliminary. Moreover, none of the results change anything regarding the serious loss of bone density and the weakening of the muscles and cardiovascular system caused by weightlessness.
New research suggests that — despite its known bad effects — weightlessness might actually slow the aging process.
Don’t jump into that spaceship yet! The research was done on worms, and is to put it mildly very preliminary. Moreover, none of the results change anything regarding the serious loss of bone density and the weakening of the muscles and cardiovascular system caused by weightlessness.
Research on ISS has found that prolonged spaceflight causes vision problems and might even damage the human eye.
Research on ISS has found that prolonged spaceflight causes vision problems and might even damage the human eye.
There had been hints of this discovery in an earlier report, but today’s paper is the first published science on the subject.
The results are not only important for finding out the medical challenges of weightlessness. They illustrate once again the need to do long extended flights on ISS. Without that research we are never going to be able to fly humans to other planets.
Research on ISS has found that prolonged spaceflight causes vision problems and might even damage the human eye.
There had been hints of this discovery in an earlier report, but today’s paper is the first published science on the subject.
The results are not only important for finding out the medical challenges of weightlessness. They illustrate once again the need to do long extended flights on ISS. Without that research we are never going to be able to fly humans to other planets.
Over-the-counter osteoporosis drug appears to keep astronauts from losing bone density on long space flights
Big news: New research on ISS now shows that the standard over-the-counter osteoporosis drugs used by millions on Earth appears to keep astronauts from losing bone density during long space flights.
Beginning in 2009, the group administered the drug to five long-stay astronauts on the International Space Station (ISS), including Koichi Wakata, 48, and Soichi Noguchi, 46. The five took the drug — an over-the-counter bisphosphonate used to treat osteoporosis — once a week starting three weeks before they lifted off until they returned to Earth. The researchers then monitored the astronauts’ bone mass over time and compared the results to those for 14 astronauts that had never taken the drug.
The results showed that the 14 who had never taken the drug had average bone density loss of 7 percent in the femur, and 5 percent in the hip bone. The five astronauts on bisphosphonate, however, only had average bone density loss in the femur of 1 percent, and even a 3 percent increase in the hip bone. Calcium levels in their urine, which rise the more bone mass is lost, were also very low.
If these results hold up, they might very well solve one of the biggest challenges faced by any interplanetary traveler. Up until now, bone loss during long weightless missions never seemed to average less than 0.5 percent per month. After spending three years going to and from Mars, an astronaut could thus lose about almost 20 percent of their bone mass in their weight-bearing bones, and would probably be unable to return to Earth.
Thus, a mission to Mars seemed impossible, unless we could build a ship with some form of artificial gravity, an engineering challenge we don’t yet have the capability to achieve.
If these already tested drugs can eliminate this problem, then the solar system is finally open to us all. All that has to happen now is to do some one to two year manned missions on ISS to test the drugs effectiveness for these long periods of weightlessness.
Big news: New research on ISS now shows that the standard over-the-counter osteoporosis drugs used by millions on Earth appears to keep astronauts from losing bone density during long space flights.
Beginning in 2009, the group administered the drug to five long-stay astronauts on the International Space Station (ISS), including Koichi Wakata, 48, and Soichi Noguchi, 46. The five took the drug — an over-the-counter bisphosphonate used to treat osteoporosis — once a week starting three weeks before they lifted off until they returned to Earth. The researchers then monitored the astronauts’ bone mass over time and compared the results to those for 14 astronauts that had never taken the drug.
The results showed that the 14 who had never taken the drug had average bone density loss of 7 percent in the femur, and 5 percent in the hip bone. The five astronauts on bisphosphonate, however, only had average bone density loss in the femur of 1 percent, and even a 3 percent increase in the hip bone. Calcium levels in their urine, which rise the more bone mass is lost, were also very low.
If these results hold up, they might very well solve one of the biggest challenges faced by any interplanetary traveler. Up until now, bone loss during long weightless missions never seemed to average less than 0.5 percent per month. After spending three years going to and from Mars, an astronaut could thus lose about almost 20 percent of their bone mass in their weight-bearing bones, and would probably be unable to return to Earth.
Thus, a mission to Mars seemed impossible, unless we could build a ship with some form of artificial gravity, an engineering challenge we don’t yet have the capability to achieve.
If these already tested drugs can eliminate this problem, then the solar system is finally open to us all. All that has to happen now is to do some one to two year manned missions on ISS to test the drugs effectiveness for these long periods of weightlessness.
A new study has been released detailing the vision problems experienced by astronauts on space flights longer than six months
A new study has been released detailing the vision problems experienced by astronauts on space flights longer than six months. Hat tip to Clark Lindsey.
The visual system changes discovered by the researchers may represent a set of adaptations to microgravity. The degree and type of response appear to vary among astronauts. Researchers hope to discover whether some astronauts are less affected by microgravity and therefore better-suited for extended space flight, such as a three-year round trip to Mars.
In their report, Drs. Mader and Lee also noted a recent NASA survey of 300 astronauts that found that correctible problems with both near and distance vision were reported by about 23 percent of astronauts on brief missions and by 48 percent of those on extended missions. The survey confirmed that for some astronauts, these vision changes continue for months or years after return to Earth.
A new study has been released detailing the vision problems experienced by astronauts on space flights longer than six months. Hat tip to Clark Lindsey.
The visual system changes discovered by the researchers may represent a set of adaptations to microgravity. The degree and type of response appear to vary among astronauts. Researchers hope to discover whether some astronauts are less affected by microgravity and therefore better-suited for extended space flight, such as a three-year round trip to Mars.
In their report, Drs. Mader and Lee also noted a recent NASA survey of 300 astronauts that found that correctible problems with both near and distance vision were reported by about 23 percent of astronauts on brief missions and by 48 percent of those on extended missions. The survey confirmed that for some astronauts, these vision changes continue for months or years after return to Earth.
Astronauts on ISS conduct eye exams in connection with recent eye problems caused by long term weightlessness
Astronauts on ISS have been conducting regular eye exams in an effort to understand the eye problems caused by long term weightlessness.
Astronauts on ISS have been conducting regular eye exams in an effort to understand the eye problems caused by long term weightlessness.
Blurred vision a risk for astronauts who spend months in space
Blurred vision is now considered a serious risk for astronauts who spend months in space.
According to one NASA survey of about 300 astronauts, nearly 30 percent of those who have flown on space shuttle missions – which usually lasted two weeks — and 60 percent who’ve completed six-month shifts aboard the station reported a gradual blurring of eyesight.
This story is a followup on information contained in an earlier National Academies report on astronaut staffing.
Blurred vision is now considered a serious risk for astronauts who spend months in space.
According to one NASA survey of about 300 astronauts, nearly 30 percent of those who have flown on space shuttle missions – which usually lasted two weeks — and 60 percent who’ve completed six-month shifts aboard the station reported a gradual blurring of eyesight.
This story is a followup on information contained in an earlier National Academies report on astronaut staffing.
The dangerous environment of space
A just released report from the National Academies, Preparing for the High Frontier: the role and training of NASA astronauts in the post-space shuttle era, describes the challenges that NASA faces in staffing its astronaut corps in the coming years. More important, however, is some new information buried in the report about the hazards of long term exposure to weightlessness.
For example, it seems a significant number of astronauts have come back from spending months at ISS with serious vision problems, caused by a newly discovered condition dubbed papilledema, the swelling of the optic disk.
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ISS Plans Week-Long Simulated Mars Mission
ISS plans week-long simulated Mars mission.
This is the right idea, but to really learn something NASA needs to commit to a year-plus long simulated mission.
ISS plans week-long simulated Mars mission.
This is the right idea, but to really learn something NASA needs to commit to a year-plus long simulated mission.