While it\u2019s true that space radiation is one of the biggest challenges for a human journey to Mars, NASA said it is developing technologies and countermeasures to ensure a safe and successful journey to the red planet.\u201cSome people think that radiation will keep NASA from sending people to Mars, but that\u2019s not the current situation,\u201d said Pat Troutman, NASA Human Exploration Strategic Analysis Lead.<\/p>\n
\u201cWhen we add the various mitigation techniques up, we are optimistic it will lead to a successful Mars mission with a healthy crew that will live a very long and productive life after they return to Earth,\u201d Troutman said in a NASA statement.<\/p>\n
NASA plans to send humans to Mars in the 2030s.<\/p>\n
Space radiation is quite different and more dangerous than radiation on Earth. Even though the International Space Station sits just within Earth\u2019s protective magnetic field, astronauts receive over ten times the radiation than what is naturally occurring on Earth.<\/p>\n
Outside the magnetic field there are galactic cosmic rays (GCRs), solar particle events (SPEs) and the Van Allen Belts, which contain trapped space radiation.<\/p>\n
\u201cOne of the most challenging parts for the human journey to Mars is the risk of radiation exposure and the inflight and long-term health consequences of the exposure,\u201d NASA Space Radiation Element Scientist Lisa Simonsen said.<\/p>\n
\u201cThis ionizing radiation travels through living tissues, depositing energy that causes structural damage to DNA and alters many cellular processes,\u201d Simonsen said.<\/p>\n
NASA is evaluating various materials and concepts to shield the crew from galactic cosmic rays which are very challenging to protect against. They are so energetic they can tear right through metals, plastic, water and cellular material.<\/p>\n
Researchers are developing and evaluating shielding concepts for transport vehicles, habitats and space suits with state of the art models at experimental facilities such as the NASA Space Radiation Laboratory (NSRL).<\/p>\n
Scientists are investigating pharmaceutical countermeasures, which may be more effective than shielding to protect crews from galactic cosmic rays.<\/p>\n
Teams are integrating radiation-sensing instruments into the Orion spacecraft, like the Hybrid Electronic Radiation Assessor.<\/p>\n
Engineers are developing enhanced space weather forecasting tools and studying faster rockets to reduce the time spent in space and exposure to radiation.<\/p>\n
NASA\u2019s Advanced Exploration Systems Division is also developing various space radiation detection and mitigation technologies.<\/p>\n
The Radiation Assessment Detector (RAD) was one of the first instruments sent to Mars specifically to prepare for future human exploration.<\/p>\n
It measures and identifies radiation on the Martian surface, such as protons, energetic ions, neutrons and gamma rays.<\/p>\n
This includes not only direct radiation from space, but also secondary radiation produced by the interaction with the Martian atmosphere and ground.<\/p>\n
\u201cMars is the best option we have right now for expanding long-term, human presence,\u201d Troutman said.<\/p>\n
\u201cWe\u2019ve already found valuable resources for sustaining humans, such as water ice just below the surface and past geological and climate evidence that Mars at one time had conditions suitable for life. What we learn about Mars will tell us more about Earth\u2019s past and future and may help answer whether life exists beyond our planet,\u201d Troutman added.<\/p>\n
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