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The Parkes telescope in New South Wales, Australia, that picked up the radio waves in April and May last year. Photograph: CSIRO/PR IMAGE

Scientists looking for aliens investigate radio beam from star closest to the sun

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Tantalising ‘signal’ appears to have come from Proxima Centauri, the closest star to the sun

Astronomers behind the most extensive search yet for alien life are investigating an intriguing radio wave emission that appears to have come from the direction of Proxima Centauri, the nearest star to the sun.

The narrow beam of radio waves was picked up during 30 hours of observations by the Parkes telescope in Australia in April and May last year, The Guardian reports. Analysis of the beam has been under way for some time and scientists have yet to identify a terrestrial culprit such as ground-based equipment or a passing satellite.

The beam that appears to have come from the direction of Proxima Centauri, a red dwarf star 4.2 light years from Earth, has not been spotted since the initial observation, according to an individual in the astronomy community who requested anonymity because the work is ongoing. “It is the first serious candidate since the ‘Wow! signal’,” they said.

Why it matters: If confirmed as a true sign of life, it would be wildly exciting. However, in all likelihood, the radio signal — found in 2019 — has a much more mundane origin story.

What’s happening: According to The Guardian, scientists with Breakthrough picked up a “narrow beam of radio waves” during observations with the Australian Parkes telescope in May and April of 2019.

  • These narrow beams are of particular interest because they look like the kinds of radio waves humans send out into the universe, but that also makes it harder to parse whether a signal like this is alien or human in origin.
  • The scientists behind the discovery haven’t been able to find an obvious explanation for the signal and are now performing follow-up observations to try to piece it together.
  • “The most obvious thing for them to do is to go back and use either Parkes or another observatory with similar sensitivity and just look again,” the SETI Institute’s Seth Shostak, who isn’t involved with the new research, told me.

What to watch: It’s still possible this signal is actually being emitted by some human cause that has yet to be found.

  • Or, the signal might even be coming from some other cosmic source with properties that have yet to be pinned down.
  • What’s next: These possibilities will require follow-up observations to give scientists a good sense of what actually produced the signal in the first place.

Be smart: The scientists have yet to publish their full findings, and it will still take a lot of analysis and confirmation to know whether or not the signal is truly alien in nature.Go deeper: Alien hunters discover mysterious signal from Proxima Centauri (Scientific American)

About Charles Igbinidu

Charles Igbinidu is a Public Relations practitioner in Lagos, Nigeria

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