Astronomers in Australia detected a strange radio signal near Earth’s orbit, sparking concerns about the growing problem of space debris. The signal was initially thought to be an unknown object, but further analysis revealed it came from an old satellite called Relay 2.
Launched in 1964, Relay 2 is now a space junk object aimlessly orbiting the planet. Researchers believe the signal may have been caused by a massive short-circuit due to static electricity on its metal skin. The satellite’s buildup of electrons resulted in a sudden spark, emitting a powerful radio wave that was thousands of times brighter than all other radio data detected.
This discovery highlights the risk of confusion between natural and man-made radio signals. With over 22,000 satellites in orbit, dead satellites pose a significant threat to astronomical observations. The study’s findings emphasize the need for careful analysis and new experiments to distinguish between astrophysical sources and electrical discharges or micrometeoroid impacts.
Experts agree that the proposed mechanism is feasible, citing previous detections of spark discharges from GPS satellites. The research underscores the importance of monitoring space debris and developing more efficient detection methods to avoid confusion between natural and man-made signals.
Source: https://edition.cnn.com/2025/06/29/science/satellite-strange-radio-signal-relay-2