Mysterious radio signal that may have been aliens is 'false positive'

'假阳性:’ Researchers think the mysterious radio signal that might have been a sign of ALIENS and was believed to come from Proxima Centauri star is likely just ‘interference from human technologies

  • The radio signal researchers thought came from Proxima Centauri is likely nothing more than a ‘false positive
  • 信号, picked up in 2020, is likely just an ‘an artifact of Earth-based interference from human technologies
  • It was initially detected in April and May 2019 from the Parkes Telescope at a frequency of 980 MHz
  • 半人马座Proxima是 4.2 距地球只有光年,并且有两个已确认的行星, a gas giant and a rocky world known as Proxima b
  • The mysterious radio signal that researchers thought may have emanated from the closest star to Earth, 半人马, was likely nothing more than a ‘false positive,’ scientists announced late Monday.

    Researchers from the Breakthrough Listen Initiative said the ‘intriguingsignal that was picked up 在 2020 is likely just an ‘an artifact of Earth-based interference from human technologies.

    Dr Sofia Sheikh, a researcher with the Listen team, looked at the data set for the signals and found they are spaced at ‘regular frequency intervals.

    The intervals appear to correspond to multiples of frequencies used by oscillators commonly used in electronic devices.

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    The radio signal researchers thought came from Proxima Centauri (图为) is likely nothing more than a 'false positive'

    The radio signal researchers thought came from Proxima Centauri (图为) is likely nothing more than a ‘false positive

    信号, picked up in 2020, is likely just an 'an artifact of Earth-based interference from human technologies.' Pictured, 与旅行者相比,Proxima B距地球有多远的非比例表示 1, 发射的最远的人造物体 1977

    信号, picked up in 2020, is likely just an ‘an artifact of Earth-based interference from human technologies.’ 图为, 与旅行者相比,Proxima B距地球有多远的非比例表示 1, 发射的最远的人造物体 1977

    The researchers scanned the Proxima Centauri star system across a wide range of frequencies, 从 700 megahertz to 4 gigahertz

    The researchers scanned the Proxima Centauri star system across a wide range of frequencies, 从 700 megahertz to 4 gigahertz

    Four million hits that were eventually whittled away to 1 million after looking at hits with no motion

    Four million hits that were eventually whittled away to 1 million after looking at hits with no motion

    The researchers scanned the Proxima Centauri star system across a wide range of frequencies, 从 700 megahertz to 4 gigahertz ‘(换一种说法, performing the equivalent of tuning to over 800 million radio channels at a time,’ 根据声明) and found 4 million hits that were eventually whittled away to 1 million after looking at hits with no motion.

    Another filter was applied for the remaining hits, as they had to appear to come from the direction of Proxima Centauri.

    The researchers pointed the Parkes Telescope at the star and then pointed it away, toggling between the ‘on-offpattern several times, which left them with 5,160 possible candidates.

    After weeding out more signals, there was one – known as BLC1 – that had ‘characteristics broadly consistent with hypothesized technosignatures,’ but it too is likely just a case of human technology.

    '综合起来, this evidence suggests that the signal is interference from human technology, although we were unable to identify its specific source,’ Sheikh said in a 声明.

    After weeding out signals, there was one, known as BLC1 (图为), that had 'characteristics broadly consistent with hypothesized technosignatures,' but it too is likely just a case of human technology

    After weeding out signals, there was one, known as BLC1 (图为), that had ‘characteristics broadly consistent with hypothesized technosignatures,’ but it too is likely just a case of human technology

    半人马座Proxima是 4.2 距地球只有光年,并且有两个已确认的行星, a gas giant (Proxima c) and a rocky world, known as Proxima b. Proxima Centauri系统的艺术家渲染.  Proxima c绕约 5.2 years around Proxima Centauri and Proxima b, 在左边, was discovered in 2016 在比水星更靠近太阳的“宜居区域”中运行的轨道

    半人马座Proxima是 4.2 距地球只有光年,并且有两个已确认的行星, a gas giant (Proxima c) and a rocky world, known as Proxima b. 艺术家对Proxima Centauri系统的渲染. Proxima c绕约 5.2 years around Proxima Centauri and Proxima b, 在左边, was discovered in 2016 在“可居住区域”内运行’ 比水星离太阳更近

    Proxima b: The nearest exoplanet to the Earth

    Proxima b is the nearest exoplanet to the Earth and the closest planet to the star Proxima Centauri.

    It orbits within the habitable zone of the starbut as Proxima Centauri is a red dwarf and much smaller than the Sun this zone is very close to the star.

    Proxima b orbits its star every 11.2 Earth days and has a mass of about 1.2 times that of the Earth.

    The rocky world is subject to solar winds 2,000 times those experienced on Earth from the Sun.

    While it is within a zone where liquid water could formthese stellar winds make it unlikely life could evolve.

    The planet was discovered in August 2016 and is likely tidally locked.

    For these reasons, despite being in the habitable zone, its actual habitability has not been established.

    Studies have suggested the planet could have surface oceans and a thin atmosphere, but that hasn’t been confirmed.

    Astronomers won’t know if it has water or an atmosphere until it can be seen transiting in front of its starwhich has yet to happen.

    If water and an atmosphere are present, even with the extensive radiation, it could be possible life has developed on the planet.

    Scientists hope the James Webb Space Telescopedue to come online next yearcould detect the atmosphere of Proxima Centauri b.

    There is also a theoretical mission to send a probe to the planet in 2069 to search for biosignatures.

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    ‘The original signal found by Shane Smith is not obviously detected when the telescope is pointed away from Proxima Centauri – but given a haystack of millions of signals, the most likely explanation is still that it is a transmission from human technology that happens to beweirdin just the right way to fool our filters.

    The radio wave signal was initially detected in April and May 2019 from the Australia-based Parkes Telescope at a frequency of 980 MHz.

    去年, members of the Breakthrough Listen Project – a $100 million initiative to find alien life through radio telescopes – ‘carefully investigatedthe mysterious signal that emanated from the star system.

    The project, founded by Israeli billionaire Yuri Milner, looks for evidence of extraterrestrial ‘technosignatures– radio waves and other evidence of extraterrestrial technology.

    Milner launched the initiative in 2015 寻找流浪或故意的外来信号,设计持续十年.

    半人马座Proxima是 4.2 距地球只有光年,并且有两个已确认的行星, 一个类似木星的天然气巨人,在这个宜居地带一个叫做Proxima b的岩石世界.

    The signal was spotted by the Parkes Telescope in Australia in early 2020, but unlike previous radio bursts, had not been attributed to any Earth-based or near-Earth human-created source at the time.

    After the researchers performed their deep dive into the signal, they found that it likely did not come from Proxima Centauri.

    ‘In the case of this particular candidate,’ Andrew Siemion, who leads Listen’s science team said, 加, ‘our analysis suggests that it’s highly unlikely that it is really from a transmitter out at Proxima Centauri.

    '然而, this is undoubtedly one of the most intriguing signals we’ve seen to date.

    The news is disappointing to some, but the findings may offer hope as experts continue to tweak the process and continue to search for signs of life.

    ‘While we were unable to conclude a genuine technosignature, we are increasingly confident that we have the necessary tools to detect and validate such signatures if they exist,’ Breakthrough Initiatives executive director Dr S. Pete Worden said.

    The findings have been published in papers in the scientific journal Nature Astronomy.








    KEY DISCOVERIES IN HUMANITY’S SEARCH FOR ALIEN LIFE

    Discovery of pulsars

    British astronomer Dame Jocelyn Bell Burnell was the first person to discover a pulsar in 1967 when she spotted a radio pulsar.

    Since then other types of pulsars that emit X-rays and gamma rays have also been spotted.

    Pulsars are essentially rotating, highly magnetised neutron stars but when they were first discovered it was believed they could have come from aliens.

    '哇!’ radio signal

    在 1977, an astronomer looking for alien life in the night sky above Ohio spotted a radio signal so powerful that he excitedly wrote ‘Wow!’ next to his data.

    在 1977, an astronomer looking for alien life in the night sky above Ohio spotted a radio signal so powerful that he excitedly wrote 'Wow!' next to his data

    在 1977, an astronomer looking for alien life in the night sky above Ohio spotted a radio signal so powerful that he excitedly wrote ‘Wow!’ next to his data

    The 72-second blast, spotted by Dr Jerry Ehman through a radio telescope, came from Sagittarius but matched no known celestial object.

    Conspiracy theorists have since claimed that the ‘Wow! 信号', 这是 30 times stronger than background radiation, was a message from intelligent extraterrestrials.

    Fossilised Martian microbes

    在 1996 Nasa and the White House made the explosive announcement that the rock contained traces of Martian bugs.

    The meteorite, catalogued as Allen Hills (ALH) 84001, crashed onto the frozen wastes of Antarctica 13,000 years ago and was recovered in 1984.

    Photographs were released showing elongated segmented objects that appeared strikingly lifelike.

    Photographs were released showing elongated segmented objects that appeared strikingly lifelike (图为)

    Photographs were released showing elongated segmented objects that appeared strikingly lifelike (图为)

    然而, the excitement did not last long. Other scientists questioned whether the meteorite samples were contaminated.

    They also argued that heat generated when the rock was blasted into space may have created mineral structures that could be mistaken for microfossils.

    Behaviour of Tabby’s Star in 2005

    星, otherwise known as KIC 8462852, is located 1,400 light years away and has baffled astronomers since being discovered in 2015.

    It dims at a much faster rate than other stars, which some experts have suggested is a sign of aliens harnessing the energy of a star.

    星, otherwise known as KIC 8462852, is located 1,400 light years away and has baffled astonomers since being discovered in 2015 (艺术家的印象)

    星, otherwise known as KIC 8462852, is located 1,400 light years away and has baffled astonomers since being discovered in 2015 (艺术家的印象)

    Recent studies have ‘eliminated the possibility of an alien megastructure’, and instead, suggests that a ring of dust could be causing the strange signals.

    Exoplanets in the Goldilocks zone in 2017

    二月里 2017 astronomers announced they had spotted a star system with planets that could support life just 39 光年远.

    Seven Earth-like planets were discovered orbiting nearby dwarf star ‘Trappist-1’, and all of them could have water at their surface, one of the key components of life.

    Three of the planets have such good conditions, that scientists say life may have already evolved on them.

    Researchers claim that they will know whether or not there is life on any of the planets within a decade, 并表示: ‘This is just the beginning.

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