nuclear-news

The ruthlessness of radiation, and its danger to astronauts

These Are The 2 Big Hurdles To Setting Up A Mars Colony, Business Insider, JESSICA ORWIG 16 Jan 15 “…….. Ruthless Radiation

“The first [hurdle] is the radiation that you’re exposed to when you’re in deep space……….Since 2008, more than 40 scientists at institutions across the country have been studying what space radiation does to the human body and how to mitigate those effects. Moreover, NASA has established nearly a dozen specialised centres of research in this field.

The sun is primary source of harmful radiation that astronauts would face on their way to Mars. Powerful bursts from the sun called solar flares, like the one shown below, release lethal doses of radiation with the power of 160 billion megatons of TNT.

We are safe here on Earth because our planet’s magnetic field and thick atmosphere protect us from these radiation blasts, but there’s no protection in space. During deep space flights, astronauts would be bombarded by dangerous, high-energy radiation, like x-rays and gamma rays, from solar flares.

The human body can handle certain kinds of radiation in small doses, but the longer you are exposed the more likely your body will blow past those “safe” radiation levels into the danger zone. The result is a series of scary symptoms like vomiting, fatigue, changes to white blood cell count, and impaired immune system, all of which could jeopardize an astronaut’s ability to do much else.

Long term, radiation exposure will increase astronauts’ risk of developing cancer and can also lead to damaged cardiovascular system, eyes, and central nervous system……….http://www.businessinsider.com.au/two-big-hurdles-to-setting-up-a-mars-colony-2015-1

January 17, 2015 - Posted by Christina Macpherson | 2 WORLD, radiation