Known astronomical objects would have emitted other radiation like high-energy X-rays at the same time, Newsweek was told. Called ASKAP J173608.2-321635, the signal was detected six times between January and September 2020 and was dubbed "very strange" since it did not emit any other types of radiation other than a radio wave. In September 2021, scientists said they had detected a mysterious radio signal that appeared to have come from the center of the Milky Way. The overall 16-day-ish cycle could give an important clue to the nature of its source, scientists said at the time. Some of them are one-offs while others repeat.Īn FRB called FRB 180916.J0158+65 was discovered in February 2020, appearing several times per day for four days before falling silent for slightly more than 12 days. These are bright radio bursts that last milliseconds and are speculated to come from high-energy astrophysical processes that are not fully understood. There have been numerous examples in recent years.įast radio bursts or FRBs often catch scientists' attention. Unexplained or unusual signals from space may naturally give rise to theories about aliens or other exotic phenomena. Specifically, one that spins comparatively slowly. The team's leading theory is that the source of the strange signal is a magnetar-a type of neutron star with an extremely intense magnetic field.
The low-frequency sky, however, is quieter. Radio signals from space are common occurrences particularly in the high-frequency spectrum due to energetic events like exploding stars. "It was kind of spooky for an astronomer because there's nothing known in the sky that does that," said Natasha Hurley-Walker, an astrophysicist at Australia's Curtin University node of the International Centre for Radio Astronomy Research, in a press release.
Image Shows James Webb Telescope 1M Miles From Earth, Surrounded by Stars.NASA Found Over 5,000 Potential Alien Worlds-Here Are Some of the Weirdest.
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