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Nasa Developing Technology to Protect from Space Radiation to reach Mars Safely

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Washington, Oct 14: While it’s 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.

“Some people think that radiation will keep NASA from sending people to Mars, but that’s not the current situation,” said Pat Troutman, NASA Human Exploration Strategic Analysis Lead.

“When 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,” Troutman said in a NASA statement.

NASA plans to send humans to Mars in the 2030s.

Space radiation is quite different and more dangerous than radiation on Earth. Even though the International Space Station sits just within Earth’s protective magnetic field, astronauts receive over ten times the radiation than what is naturally occurring on Earth.

Outside the magnetic field there are galactic cosmic rays (GCRs), solar particle events (SPEs) and the Van Allen Belts, which contain trapped space radiation.

“One 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,” NASA Space Radiation Element Scientist Lisa Simonsen said.

“This ionizing radiation travels through living tissues, depositing energy that causes structural damage to DNA and alters many cellular processes,” Simonsen said.

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.

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).

Scientists are investigating pharmaceutical countermeasures, which may be more effective than shielding to protect crews from galactic cosmic rays.

Teams are integrating radiation-sensing instruments into the Orion spacecraft, like the Hybrid Electronic Radiation Assessor.

Engineers are developing enhanced space weather forecasting tools and studying faster rockets to reduce the time spent in space and exposure to radiation.

NASA’s Advanced Exploration Systems Division is also developing various space radiation detection and mitigation technologies.

The Radiation Assessment Detector (RAD) was one of the first instruments sent to Mars specifically to prepare for future human exploration.

It measures and identifies radiation on the Martian surface, such as protons, energetic ions, neutrons and gamma rays.

This includes not only direct radiation from space, but also secondary radiation produced by the interaction with the Martian atmosphere and ground.

“Mars is the best option we have right now for expanding long-term, human presence,” Troutman said.

“We’ve 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’s past and future and may help answer whether life exists beyond our planet,” Troutman added.(IANS)

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NASA’s 2020 Mars rover to have 23 ‘eyes’

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NASA's 2020 Mars rover to have 23 'eyes'. Pixabay

Washington, Nov 1,2017: NASA said its Mars 2020 mission will have more “eyes” than any rover before it – a grand total of 23, to create sweeping panoramas, reveal obstacles, study the atmosphere and assist science instruments.

They will provide dramatic views during the rover’s descent to Mars and be the first to capture images of a parachute as it opens on another planet.

 There will even be a camera inside the rover’s body, which will study samples as they are stored and left on the surface for collection by a future mission, NASA said on Tuesday.

When NASA’s Mars Pathfinder touched down in 1997, it had five cameras. The subsequent Spirit and Opportunity rovers were designed with 10 cameras each, including on their landers. The Curiosity rover has 17 cameras.

“Camera technology keeps improving,” said Justin Maki of NASA’s Jet Propulsion Laboratory in Pasadena, California.

“Each successive mission is able to utilise these improvements, with better performance and lower cost,” Maki said.

The cameras on 2020 will include more colour and 3-D imaging than on Curiosity, said Jim Bell of Arizona State University.

“Routinely using 3-D images at high resolution could pay off in a big way,” Bell said. “They’re useful for both long-range and near-field science targets.”(IANS)

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