[rael-science] NASA’s Curiosity finds humans could survive radiation levels on Mars‏

วันพุธที่ 21 พฤศจิกายน พ.ศ. 2555

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Source:  http://thespacereporter.com/2012/11/nasas-curiosity-finds-humans-could-survive-radiation-levels-on-mars/

NASA’s Curiosity rover has reportedly discovered radiation levels on Mars are low enough for humans to survive, granted they stay alive during the six-month journey to the Red Planet.
In a press conference on Friday, top NASA officials say recent data obtained by the one-ton rover shows radiation levels on Mars are low enough for humans. According to NASA, the rover linked rhythmic changes in radiation to daily atmospheric changes, finding levels low enough to sustain a two-year mission to Mars.
“Absolutely, astronauts can live in this environment,” said Don Hassler, of Boulder, Colorado’s, Southwest Research Institute. Mr. Hassler is the principal investigator for Curiosity’s Radiation Assessment Detector (RAD).
“It’s never really been a question of if we can go to Mars, it’s a matter of when we go, how do we best protect our astronauts,” Mr. Hassler said.
The Colorado radiation expert said data collected by Curiosity shows that the thin atmosphere of Mars does provide protection from solar radiation.
“We see a definite pattern related to the daily thermal tides of the atmosphere,” Mr. Hassler said.. “The atmosphere provides a level of shielding, and so charged-particle radiation is less when the atmosphere is thicker. Overall, Mars’ atmosphere reduces the radiation dose compared to what we saw during the flight to Mars.”
That said, it remains unclear whether astronauts traveling to the planet would experience an increased risk in the event of solar flare. Flares are comprised of millions of charged particles that could leave astronauts exposed to high amounts of radiation.
The news was met with enthusiasm among a community of Mars enthusiasts. While the findings are likely to increase the odds of a manned mission to Mars, humans would still experience higher levels of radiation on the way to and from the Red Planet.
The findings was part of an upcoming mission in which Curiosity will attempt to discern whether atmospheric conditions could have created an environment favorable to life. Rover Environmental Monitoring Station (REMS) monitoring of air pressure has tracked both a seasonal increase and a daily rhythm. Neither was unexpected, but the details improve understanding of atmospheric cycles on present-day Mars, which helps with estimating how the cycles may have operated in the past, according to NASA.
Scientists say the data collected by the rover could allow them to better understand past atmospheric conditions on the planet. An understanding of past conditions could provide further evidence whether the planet once harbored life.
The overall goal of NASA’s Mars Science Laboratory mission is to use ten instruments on Curiosity to assess whether areas inside Gale Crater ever offered a habitable environment for microbes.
JPL, a division of the California Institute of Technology in Pasadena, manages the project for NASA’s Science Mission Directorate, Washington, and built Curiosity.

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"Ethics" is simply a last-gasp attempt by deist conservatives and
orthodox dogmatics to keep humanity in ignorance and obscurantism,
through the well tried fermentation of fear, the fear of science and
new technologies.
 
There is nothing glorious about what our ancestors call history, 
it is simply a succession of mistakes, intolerances and violations.
 
On the contrary, let us embrace Science and the new technologies
unfettered, for it is these which will liberate mankind from the
myth of god, and free us from our age old fears, from disease,
death and the sweat of labour.
 
Rael
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WARNING FROM RAEL: For those who don't use their intelligence at its
full capacity, the label "selected by RAEL" on some articles does not
mean that I agree with their content or support it. "Selected by RAEL"
means that I believe it is important for the people of this planet to
know about what people think or do, even when what they think or do is
completely stupid and against our philosophy. When I selected articles
in the past about stupid Christian fundamentalists in America praying
for rain, I am sure no Rael-Science reader was stupid enough to
believe that I was supporting praying to change the weather. So, when
I select articles which are in favor of drugs, anti-semitic,
anti-Jewish, racist, revisionist, or inciting hatred against any group
or religion, or any other stupid article, it does not mean that I
support them. It just means that it is important for all human beings
to know about them. Common sense, which is usually very good among our
readers, is good enough to understand that. When, like in the recent
articles on drug decriminalization, it is necessary to make it
clearer, I add a comment, which in this case was very clear: I support
decriminalizing all drugs, as it is stupid to throw depressed and sad
people (as only depressed and sad people use drugs) in prison and ruin
their life with a criminal record. That does not mean that there is
any change to the Message which says clearly that we must not use any
drug except for medical purposes. The same applies to the freedom of
expression which must be absolute. That does not mean again of course
that I agree with anti-Jews, antisemites, racists of any kind or
anti-Raelians. But by knowing your enemies or the enemies of your
values, you are better equipped to fight them. With love and respect
of course, and with the wonderful sentence of the French philosopher
Voltaire in mind: "I disapprove of what you say, but I will defend to
the death your right to say it".