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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.。据蓝鲸新闻报道，时隔四天，韦东奕下架了带货链接。记者发现，8月22日晚，北京大学数学科学学院副教授韦东奕从其B站账号小店中撤下了此前上架的两套数学练习册链接。

二 | 在下架之前，这两套由他主编的中小学数学教辅，累计销量已突破2.6万件，按售价估算销售额超过100万元。8月18日晚，韦东奕时隔一年多更新B站账号，发布视频《一道有趣的数学题》，仅展示一道小学四年级数学题的解法，开头标注“韦东奕主编《数学能力》”。练习册上架初期，不少网友对账号及商品真实性表示怀疑。8月21日，记者从龙门书局出版社了解到，该系列图书是本周正式上新的，在龙门书局官方账号及韦东奕个人账号均有售卖，图书内容偏向培优方向，由韦东奕本人亲自主编。该店铺背后公司为“杭州奕数文化产业发展有限公司”，天眼查显示，公司成立于2026年5月22日，注册资本100万元，法定代表人曹恩铭。