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一颗死亡的 NASA 卫星突然发射出强大的射电信号
#NASA

NASA Relay 2 实验通信卫星于 1964 年发射升空,1967 年完全停止运作,之后一直停留在轨道上。将近 60 年后,澳大利亚天文学家使用射电望远镜阵列 Australian Square Kilometre Array Pathfinder (ASKAP)搜寻快速射电暴信号时在 Relay 2 所处位置探测到了短暂而强大的射电脉冲,令他们困惑不已。信号持续不到 30 纳秒,但在短时间内其亮度超过了天空中的所有其他天体。他们一开始以为是新的脉冲星或类似天体,之后发现信号来自于地球轨道上的 Relay 2。他们猜测可能是静电放电之类的事件,或者微陨石撞击产生的带电等离子体云。
arXiv:2506.11462
www.newscientist.com/article/2485157-dead-nasa-satellite-unexpectedly-emits-powerful-radio-pulse/



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一颗死亡的 NASA 卫星突然发射出强大的射电信号
#NASA

NASA Relay 2 实验通信卫星于 1964 年发射升空,1967 年完全停止运作,之后一直停留在轨道上。将近 60 年后,澳大利亚天文学家使用射电望远镜阵列 Australian Square Kilometre Array Pathfinder (ASKAP)搜寻快速射电暴信号时在 Relay 2 所处位置探测到了短暂而强大的射电脉冲,令他们困惑不已。信号持续不到 30 纳秒,但在短时间内其亮度超过了天空中的所有其他天体。他们一开始以为是新的脉冲星或类似天体,之后发现信号来自于地球轨道上的 Relay 2。他们猜测可能是静电放电之类的事件,或者微陨石撞击产生的带电等离子体云。
arXiv:2506.11462
www.newscientist.com/article/2485157-dead-nasa-satellite-unexpectedly-emits-powerful-radio-pulse/

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