Posted on 09/20/2018 2:03:35 PM PDT by ETL
There are plenty of challenges to putting people on Mars, whether you look at the rocket, the astronaut or the planet itself.
New data from one of the many spacecraft at work around Mars confirm just how dangerous a round-trip human journey would be by measuring the amount of radiation an astronaut would experience.
Cosmic radiation is made up of incredibly tiny particles moving incredibly fast, nearly at the speed of light — the sort of phenomenon a human body isn't very well equipped to withstand. That radiation travels across all of space, but Earth's atmosphere buffers us from the worst of its impacts. That means the farther away from Earth's surface you go, the more cosmic radiation your body absorbs.
[Space Radiation Threat to Astronauts Explained (Infographic)]
By the time you're traveling to and from Mars, that gets to be a very big problem. "Radiation doses accumulated by astronauts in interplanetary space would be several hundred times larger than the doses accumulated by humans over the same time period on Earth, and several times larger than the doses of astronauts and cosmonauts working on the International Space Station," Jordanka Semkova, a physicist at the Bulgarian Academy of Sciences and lead scientist on the new research, said in a statement. "Our results show that the journey itself would provide very significant exposure for the astronauts to radiation."
Those results are based on data from the European Space Agency's Trace Gas Orbiter, a spacecraft that has been circling the Red Planet since 2016. One of the instruments it carries is a dosimeter, which has been taking measurements throughout the orbiter's journey.
According to the team behind the new research, those measurements show that just getting to and from Mars would expose astronauts to at least 60 percent of the current recommended maximum career exposure.
What precisely that recommended maximum is varies with sex and age, but it ranges from 1 sievert for a 25-year-old woman to 4 sieverts for a 55-year-old man. (The measurement of sieverts already accounts for differences in weight.)
But 60 percent just for the round-trip is particularly concerning, since presumably the point of going to Mars is to spend at least a little time on the planet's surface — ideally, without overdosing on radiation.
Water and polyethylene both have hydrogen, which shields against some radiation. Choose wisely.
Serendipity in that they dodged exposure to a nasty solar flare. Exposure from background deemed acceptable for military crew volunteers flying the missions.
It's lucky for the colonists that they'll have to live deep underground because of the lack of atmosphere, because on the Martian surface, the radiation is also higher than it is here on Earth. Mole people! Thanks ETL.
If Bigfoot can take the radiation................
Who places that cow-flop on her head each day, and is it a fresh one?
He might mutate into something even more terrifying!
You’re welcome. And thank you.
But, did it turn Mike into a female??
Time.
Mars will take a couple days longer to reach.
And why do they have to report this in SI units?
The Mars TV series had them living underground. But, the pacing of the show was so slow and the characters so uninteresting that even I quit watching.
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