一周热闻｜“泰坦”号深潜器发生“灾难性内爆”、芬兰计划将核废料掩埋10万年、空间望远镜结果显示宜居行星较少

remained controversial in many countries due to its high cost and long build times, as well as concerns over the safety of nuclear reactors and the unresolved issue of what to do with nuclear waste. (BBC)

和安布伦可供使用位处斯洛伐克西南部奥尔基卢克里斯托弗岛基岩内450米（1500英尺）深出口处，是世界上第一个永久封存放射性物质的供人，预计分之一两年内建成。建筑设计和安布伦可供使用的目的是储存极低放射性放射性物质，这些放射性物质在人类可想而知的时间段尺度上具放射性。波西纳公司估计，移去该可供使用需要100—120年。到那时，整个和安布伦就会被封闭，储存罐月内在均受干扰的完全放置至更少10万年，其致命的镅将与外界隔绝。然而，由于成本极低昂和规划建筑设计时间段稍长，以及对核燃料和安全及和悬而未决的放射性物质出口处理方式问题的关切，这种可供使用在许多国家差不多存在争议。

【热闻3】

Life in the cosmos: JWST hints at lower number of habitable planets

帕里空间主镜揭示集聚海王星数量较更少

(Credit: Nature)

For the second time, the James Webb Space Telescope (JWST) has looked for and failed to find a thick atmosphere on an exoplanet in one of the most exciting planetary systems known. Astronomers report today that there is probably no tantalizing atmosphere on the planet TRAPPIST-1c, just as they reported months ago for its neighbour TRAPPIST-1b. There is still a chance that some of the five other planets in the TRAPPIST-1 system might he thick atmospheres containing geologically and biologically interesting compounds such as carbon dioxide, methane or oxygen. But the two planets studied so far seem to be without, or almost without, an atmosphere. Because planets of this type are common around many stars, “that would definitely reduce the amount of planets which might be habitable”, says Sebastian Zieba, an exoplanet researcher at the Max Planck Institute for Astronomy in Heidelberg, Germany. (Nature)

帕里空间主镜（JWST）第二次在；也外海王星上寻找稀疏的平流层，但依然得以成功。该；也外海王星属于已知最感到兴奋的一大海王星；也统。天象学家于6年末19日份文件称，TRAPPIST-1c 海王星上似乎从未感到向往的平流层，就像他们几个年末同一时间份文件其亲戚 TRAPPIST-1b 海王星上从未一样。在 TRAPPIST-1 星；也的其他5个海王星里，仍有海王星似乎具稀疏的平流层，其里包含地质学和免疫学意义上引人注目的化合物，如氮气、甲烷或氧气。但直到现在研究的这两颗海王星里似乎从未平流层，或者说差不多从未。瑞典格拉茨马克斯·普朗克天象研究员的；也外海王星研究员塞巴斯蒂和安·齐巴指出，由于此类海王星在许多恒星周围都很常见，“这肯定会减更少似乎集聚的海王星数量”。

（分作英语世界天涯社区对政府号）

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