Difference between revisions of "Long duration space flight"
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The longest time spent in space is currently 878 days, 11 hours, & 29 minutes, by Gennadi Ivanovich Padalka of the USSR. | The longest time spent in space is currently 878 days, 11 hours, & 29 minutes, by Gennadi Ivanovich Padalka of the USSR. | ||
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| + | ==Cumulative Radiation Exposure== | ||
The radiation received in the International Space Station is 144 milliSievert / year. This is about 28% of the radiation dose of a 2.5 year Mars mission (assuming a mission where the total radiation exposure is 520 mSv). See the Mars Direct Mission, described in the "Case for Mars", by Robert Zubrin. | The radiation received in the International Space Station is 144 milliSievert / year. This is about 28% of the radiation dose of a 2.5 year Mars mission (assuming a mission where the total radiation exposure is 520 mSv). See the Mars Direct Mission, described in the "Case for Mars", by Robert Zubrin. | ||
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| + | This number does not mean much, but these values might give some perspective: | ||
| + | -- the average radiation on Earth is 6.2 mSv per year. | ||
| + | -- the average radiation in the city Ramsar, Iran is 260 mSv / year. (This city does not show any health effects from this high dose, & is considered a maximum safe value.) | ||
| + | See: <ref>https://pubmed.ncbi.nlm.nih.gov/11769138/|Very high background radiation areas of Ramsar, Iran: preliminary biological studies.</ref>, <ref>https://www.ecolo.org/documents/documents_in_english/ramsar-natural-radioactivity/ramsar.html</ref>, | ||
| + | <ref>https://aerb.gov.in/images/PDF/image/34086353.pdf|Ramsar suggests that current regulations for radiation are too strict.</ref><ref>https://www.sciencedirect.com/science/article/abs/pii/S0531513104018369|Natives of Ramsar had better response to high gamma ray doses</ref>, <ref>https://www.researchgate.net/publication/228757260_Are_the_Inhabitants_of_High_Background_Radiation_Areas_of_Ramsar_More_Radioresistant_Scope_of_the_Problem_and_the_Need_for_Future_Studies</ref>, <ref>https://www.ntanet.net/the-naturally-occurring-high-radiation-levels-of-ramsar-iran/</ref> | ||
| + | -- the radiation (from cosmic rays) in Vancouver B.C (at sea level) is 0.30 mSv / year. | ||
| + | -- the radiation (from cosmic rays) from the top of Mt. Lorne, Yukon (at 2,000 m) is 0.84 mSv / year.<ref>https://www.cnsc-ccsn.gc.ca/eng/resources/radiation/radiation-doses/#|Gov of Canada, Radiation Doses</ref> | ||
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Revision as of 01:33, 2 July 2024
The number of astronauts who have been in space for a long time is steadily increasing. The number people who have spent more than a year in space currently numbers 52. [1]
The longest time spent in space is currently 878 days, 11 hours, & 29 minutes, by Gennadi Ivanovich Padalka of the USSR.
Cumulative Radiation Exposure
The radiation received in the International Space Station is 144 milliSievert / year. This is about 28% of the radiation dose of a 2.5 year Mars mission (assuming a mission where the total radiation exposure is 520 mSv). See the Mars Direct Mission, described in the "Case for Mars", by Robert Zubrin.
This number does not mean much, but these values might give some perspective: -- the average radiation on Earth is 6.2 mSv per year. -- the average radiation in the city Ramsar, Iran is 260 mSv / year. (This city does not show any health effects from this high dose, & is considered a maximum safe value.) See: [2], [3], [4][5], [6], [7] -- the radiation (from cosmic rays) in Vancouver B.C (at sea level) is 0.30 mSv / year. -- the radiation (from cosmic rays) from the top of Mt. Lorne, Yukon (at 2,000 m) is 0.84 mSv / year.[8]
This page is a stub, and can be expanded.
References:
- ↑ http://www.spacefacts.de/english/e_tis.htm%7CAstronauts & Cosmonauts Sorted by Time In Space
- ↑ https://pubmed.ncbi.nlm.nih.gov/11769138/%7CVery high background radiation areas of Ramsar, Iran: preliminary biological studies.
- ↑ https://www.ecolo.org/documents/documents_in_english/ramsar-natural-radioactivity/ramsar.html
- ↑ https://aerb.gov.in/images/PDF/image/34086353.pdf%7CRamsar suggests that current regulations for radiation are too strict.
- ↑ https://www.sciencedirect.com/science/article/abs/pii/S0531513104018369%7CNatives of Ramsar had better response to high gamma ray doses
- ↑ https://www.researchgate.net/publication/228757260_Are_the_Inhabitants_of_High_Background_Radiation_Areas_of_Ramsar_More_Radioresistant_Scope_of_the_Problem_and_the_Need_for_Future_Studies
- ↑ https://www.ntanet.net/the-naturally-occurring-high-radiation-levels-of-ramsar-iran/
- ↑ https://www.cnsc-ccsn.gc.ca/eng/resources/radiation/radiation-doses/#%7CGov of Canada, Radiation Doses
