近日，国家国防科技工业局公开招聘'行星防御岗'的消息引发广泛关注。这一岗位的设立旨在通过先进的监测、预警、拦截或偏转技术，保护地球免受近地小行星或彗星的威胁。与此同时，一颗编号为2024YR4的小行星成为全球焦点。这颗小行星在2024年12月27日与 ...

近日，国家国防科技工业局发布了一则令人震惊的消息：公开招聘'行星防御岗'！这一岗位的核心任务是通过监测、预警、拦截或偏转等技术手段，防止近地小行星或彗星等天体撞击地球。消息一出，迅速引发热议。

“实际上，小天体来地球，这件事几乎每个月都会发生。”天文领域科普专家、全国科普工作先进者曹林也表示，生活在地球的人类已经拥有了一层天然的“金钟罩”，厚厚的大气层能够有效防御大部分小天体的“袭击”：当小行星以极高速度进入大气，高温高压冲击波会使机构疏松的解体成碎块，在第一关就燃烧殆尽。只有那些个头足够大、密度足够高的天体才有可能突破大气层的防御，对地球上的生物体形成威胁。

Tyler is an associate writer under CNET's home energy and utilities category. Tyler came to CNET straight out of college where he graduated from Seton Hall with a bachelor's degree in journalism.

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