A radiation sensor inside NASA’s Curiosity Mars rover shows that even under the best-case scenario and behind shielding currently being designed for NASA’s new deep-space capsule, future travelers will face a huge amount of radiation.
The results, based on Curiosity’s 253-day, 348-million-mile cruise to Mars, indicate an astronaut most likely would exceed the current U.S. lifetime radiation exposure limit during one round trip mission.
“Even for the shortest of missions we are perilously close to the radiation career and health limits that we’ve established for our astronauts,” NASA’s chief medical officer Richard Williams told a National Academy of Sciences’ medical committee on Thursday.
The Institute of Medicine panel is looking into ethics and health standards for long-duration spaceflights.
Curiosity, which landed inside a giant impact basin near the Martian equator on Aug. 5, 2012, continues to collect radiation data as it conducts its primary mission to look for habitats that could have supported ancient or possible present day microbial life.
Curiosity’s Radiation Assessment Detector, known as RAD, measures the amount and energy levels of highly energetic particles in galactic cosmic rays and from the sun. Scientists then converted the data into radiation dosage units known as sieverts, which are associated with increased cancer risk.
Current U.S. standards limit an astronaut’s lifetime radiation exposure to 1 Sievert, or 1,000 milliSieverts, which equates to about a five percent chance increase in developing a fatal cancer.
A new study shows that with currently available propulsion technologies and similar shielding to Curiosity’s, astronauts on even the shortest roundtrips to Mars would get radiation doses of about 662 millisieverts and that doesn’t include radiation dosages for any time spent on the Martian surface.
“We have a challenge,” Williams said during a webcast meeting on Thursday of the spaceflight health and medical ethics committee.
“We have the probability that in pursuing exploration-class missions beyond low-Earth orbit of long-duration that we will exceed the standards that we have already promulgated inside the agency. We need the advice of the committee on how best to go about proactively resolving some of these potential conflicts,” Williams said.
In general, Curiosity’s shielding was more effective against particles emitted during solar storms, known as coronal mass ejections, than galactic cosmic rays.
Kansas City Jewish Community Center shooter: “I was an FBI Informant” 2014 04 24 Kansas City Jewish Community Center shooter: “I was an FBI Informant”
…… Which is EXACTLY how we called it when this story broke a few weeks back. We also mentioned that the SPLC, just discarded from the FBI “hate” website… Would be the prime benefactor.
Ex-KKK Leader Was Given a New Identity Years Before Shooting
Glenn Miller Claims He Was an FBI Informant
Meet AISight – The Artificial Intelligence Software Being Installed on CCTV Networks Globally 2014 04 24 If you thought that CCTV cameras tracking your every move in public was bad enough, you’re going to just love AISight (pronounced “eyesight” of course). The invention of a Houston, Texas based company called BRS Labs (which stands for Behavioral Recognition Systems) is headed by former secret service special agent John Frazzini, and this Orwellian surveillance platform brings artificial intelligence ...
Biofuel Made From Corn Waste Less ‘Green’ Than Gasoline 2014 04 24 Biofuel created from corn waste may not be the clean, eco-friendly oil alternative the United States government is hoping for. A new study has found that fuel generated from harvested corn leftovers creates more greenhouse gases than conventional gasoline — at least in the short term.
The fuel under study, called cellulosic ethanol, has been touted in recent years as a ...
Swedes open coffin of 850-year-old king 2014 04 24
Scientists pried open the 850-year-old casket of King Erik the Holy on Wednesday, hoping to find out more about the king, his crown, and his eating habits.
"This was a very special occasion, especially considering the importance of Saint Erik religiously in Sweden," Uppsala Cathedral Chaplain Lars Åstrand told The Local.
The casket contained the bones of King ...
John Kerry and the Pope set to face off with Jewish Knight Templars on the Temple Mount 2014 04 24
This is the week that supposedly spells the end of the peace process or its end. My money is on a continuation that has no real substance or direction.
What’s the alternative?
With Passover and Easter over, Secretary Kerry can return to the Middle East crisis. This, after dealing so successfully with crisis in the Ukraine. [Is the author joking? - RIC]