一组天文学家发现了死者的信息。根据关于A​​rxiv的一篇新论文，在2024年6月被发现的一系列瞬态无线电波实际上是来自不活动的NASA卫星的信号。尽管信号的发生令人惊讶，但这并不是死去的卫星自发重新启动，打开并恢复了对天文学家和地球上天文台的传播。取而代之的是，该团队说该信号可能是由于静电放电或ESD事件所致 - 电力积累，以无线电信号的火花散布。 “Our observation opens new possibilities for the remote sensing of ESD,” the team wrote in its paper, “and reveals a new source of false events for observations of astrophysical transients.”Read More: Unexplainable Radio Waves Under Antarctica's Ice Defy the Laws of Particle PhysicsShort Radio SignalsRadio signals come from all corners of space, and they tell astronomers much about the structure and composition of the celestial objects around us.实际上，射电望远镜不仅可以从行星，恒星和星系中捕获无线电波。 they also catch signals from comets and clouds of charged gases, as well as from pulsars and many of the other occupants of far-off space.While searching for a type of faraway radio transmission called a fast radio burst (FRB) — which are thought to be released by magnetic neutron stars, or magnetars — astronomers operating the Australian Square Kilometre Array Pathfinder (ASKAP), a terrestrial radio telescope located in Western Australia, detected a surprisingly short signal. The burst was less than 30 nanoseconds long — a remarkably short duration for any radio burst.Using the location of their observations and the time of the burst, the team discovered that the radio waves were not from a star, a galaxy, or any other distant astronomical source, but a deactivated communications satellite called Relay 2, which continues to orbit Earth, around 2,