Space is full of mysteries, and among the most intriguing are unexplained signals that have been detected from various corners of the cosmos. These signals have captured the imagination of scientists and the public alike. Here are ten mysterious space signals:
The Wow! Signal (1977): Detected by astronomer Jerry R. Ehman at Ohio State University's Big Ear radio telescope, this strong narrowband radio signal lasted for 72 seconds and came from the direction of the constellation Sagittarius. Despite numerous attempts to detect it again, the origin remains unknown.
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Fast Radio Bursts (FRBs) (2007-present): First discovered in 2007, FRBs are intense bursts of radio waves lasting mere milliseconds. Their origins are still a mystery, though theories range from neutron stars to extraterrestrial intelligence.
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Tabby’s Star (KIC 8462852) (2015): This star showed unusual dimming patterns suggesting something large was passing in front of it, leading to speculation about alien megastructures like Dyson spheres, although dust clouds are now considered a more plausible explanation.
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BLC1 Signal (Breakthrough Listen - 2020): A signal detected by the Parkes radio telescope in Australia while searching for signs of intelligent life around Proxima Centauri. Initially thought to be promising, further analysis suggested it was likely terrestrial interference.
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Lorimer Burst (FRB 010724) (2007): The first-discovered fast radio burst, named after Duncan Lorimer who led the team that discovered it. It sparked significant interest due to its high dispersion measure, hinting at an extragalactic origin.
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Perytons (1998-2015): Mysterious radio bursts detected at the Parkes Observatory were initially thought to be of astronomical origin but were later found to be caused by staff members opening the door of the facility’s kitchen microwave oven during its operation.
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Galactic Center Radio Transient GCRT J1745-3009 (2002): An intermittent radio source near the center of our galaxy, it emits powerful radio waves for periods lasting several minutes before disappearing. Its exact nature remains unknown.
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Magnetar Flares: Magnetars, a type of neutron star with extremely powerful magnetic fields, occasionally emit massive bursts of gamma rays and X-rays. While these flares are understood to some extent, their precise mechanisms remain a subject of study.
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Long-Delayed Echoes: Observed since the 1920s, these are radio signals that return to Earth after a delay ranging from seconds to days. Various hypotheses exist, including reflections off distant plasma clouds or even extraterrestrial retransmissions.
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Antikythera Mechanism (Not a Space Signal, but related to ancient astronomy): Though not a signal from space, the discovery of this ancient Greek analog computer highlights how historical mysteries can also intrigue modern scientists. It was used to predict astronomical positions and eclipses for calendrical and astrological purposes.
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