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This is Scientific American's 60-Second Space. I'm John Matson. Got a minute?
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Even a perfect flight to Mars poses big health risks for astronauts.
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Because once they were outside Earth's protective magnetic field, astronauts would be bombarded by radiation from cosmic rays and solar outbursts.
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But a side benefit of NASA's Curiosity rover mission is that we now know about how much radiation an interplanetary traveler would face.
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"The primary objective of RAD was to characterize the radiation environment on the surface of Mars."
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Donald Hassler, director of the Mars Science Laboratory Radiation Assessment Detector, or RAD, on Curiosity, at a press conference May 30th.
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"But we realized about a year and a half before launch that taking measurements during the cruise phase on the way to Mars in deep space would be not so different than acting as a proxy for the radiation environment that a future human astronaut might experience in their spacecraft on their way to Mars.
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So we turned RAD on about 10 days after the launch of Curiosity and we took about seven months of data."
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Using that data, mission scientists calculated that a Mars round-trip would expose a person to more than 100 times the average annual exposure of someone on Earth.
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And, critically, the radiation dose from a Mars trip could exceed the lifetime exposure limits space agencies have established for their astronauts,
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increasing the chances of cancer and central nervous system damage.
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Their report is in the journal Science.
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Better shielding on a manned mission would help limit the risk, from both galactic cosmic rays and energetic particles from the sun.
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But keep in mind that Curiosity cruised to Mars during a relatively mild period of solar activity.
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If the sun acted up during an unlucky flight, astronauts would need extra protection to avoid taking a solar radiation beating.
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Thanks for the minute, for Scientific American's 60-Second Space. I'm John Matson.
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显示原文 =This is Scientific American's 60-Second Space. I'm John Matson. Got a minute?
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显示原文 =Even a perfect flight to Mars poses big health risks for astronauts.
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显示原文 =Because once they were outside Earth's protective magnetic field, astronauts would be bombarded by radiation from cosmic rays and solar outbursts.
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显示原文 =But a side benefit of NASA's Curiosity rover mission is that we now know about how much radiation an interplanetary traveler would face.
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显示原文 ="The primary objective of RAD was to characterize the radiation environment on the surface of Mars."
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显示原文 =Donald Hassler, director of the Mars Science Laboratory Radiation Assessment Detector, or RAD, on Curiosity, at a press conference May 30th.
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7 / 16
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显示原文 ="But we realized about a year and a half before launch that taking measurements during the cruise phase on the way to Mars in deep space would be not so different than acting as a proxy for the radiation environment that a future human astronaut might experience in their spacecraft on their way to Mars.
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显示原文 =So we turned RAD on about 10 days after the launch of Curiosity and we took about seven months of data."
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显示原文 =Using that data, mission scientists calculated that a Mars round-trip would expose a person to more than 100 times the average annual exposure of someone on Earth.
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10 / 16
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显示原文 =And, critically, the radiation dose from a Mars trip could exceed the lifetime exposure limits space agencies have established for their astronauts,
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11 / 16
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显示原文 =increasing the chances of cancer and central nervous system damage.
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显示原文 =Their report is in the journal Science.
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显示原文 =Better shielding on a manned mission would help limit the risk, from both galactic cosmic rays and energetic particles from the sun.
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显示原文 =But keep in mind that Curiosity cruised to Mars during a relatively mild period of solar activity.
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显示原文 =If the sun acted up during an unlucky flight, astronauts would need extra protection to avoid taking a solar radiation beating.
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显示原文 =Thanks for the minute, for Scientific American's 60-Second Space. I'm John Matson.
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