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Crewed Mission to Mars May Be Exposed to Unsafe Levels of Radiation, Study Warns_我的网站

一 |     While scientists and science fiction authors alike have long dreamed of sending crewed missions to Mars, a new study suggests these plans may hit a snag – a big one.,The authors of a yet to be peer-reviewed study argue that the participants of such a mission to Mars would end up being exposed to radiation – namely, to “energetic charged particles from Galactic and Solar origin” – both while in transit and while on the planet itself, with the “thin spacecraft shield” and “rarefied Martian atmosphere” offering little in the way of protection.,The research team attempted to gauge the impact of a simulated 1,000-day mission to Mars on various organs of the human body, and concluded that astronauts may be exposed to radiation doses above one Sievert, which is over the safe limit set by most space agencies, New Scientist points out.,“We suggest mitigation strategies such as improved ways of shielding and dietary supplements, and make recommendations for the safety of astronauts in future crewed missions to Mars,” the team wrote in the abstract of their work available on the arXiv preprint server.,Ideas about how astronauts may be protected from radiation during a mission to Mars have already been proposed, such as the concept of a radiation shield comprised of a fungus found growing at the Chernobyl Nuclear Power Plant.,Last year, one architecture studio even unveiled a project for a self-sufficient and sustainable city that would be built on the red planet itself.。    《日报》全媒体记者 王野报道          　　6月15日上午，为更好地普及并提高渔业船员的安全生产意识，在市海洋与渔业局指导下，兴城市海洋与渔业局在兴城海浪屿假日酒店举办海洋与渔业安全生产培训班。

二 |                              　　参加本次培训班的人员有市和兴城市渔业执法队的相关部门负责人以及来自兴城市各沿海乡镇涉海渔业船员共130余人。

三 | 本次渔业安全生产培训时间正值伏季休渔期间，兴城属地各沿海乡镇渔业船舶均已按政府要求回港休渔或上坞维修，渔业船员正处于闲暇时，这个时候举办渔业安全生产培训班时间非常适宜，通过举办渔业安全生产培训让广大渔业船员提高安全生产意识，加强渔业安全生产技能，对我市渔业安全生产工作可谓意义重大。

四 |                                  　　据了解，按照市海洋与渔业局统一部署，海洋与安全生产培训班将在沿海县区陆续开班培训。                   　　《日报》全媒体记者 王野 摄。

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