What are these weird radio signals from a nearby red dwarf star?

The Areicibo Observatory in Puerto Rico, which first heard the weird radio signals. Photo Credit: Arecibo Observatory/NSF

Astronomers are continuing to monitor a nearby red dwarf star after detecting unusual radio signals apparently coming from the star. It is hoped that additional observations will help to determine the source of the signals, which so far haven’t been explained.

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Aliens or comets? Has the ‘Wow!’ signal mystery finally been solved?

Illustration showing the location of the “Wow!” signal in 1977, from the direction of a group of stars called Chi Sagittarii, and where the comets were located and monitored. Image Credit: The Center for Planetary Science

The search for evidence of extraterrestrial intelligence is one of the most exciting pursuits in astronomy today. Needless to say, there is a lot of controversy and debate surrounding the topic, partly due to an event which happened in 1977 – the famous “Wow!” signal. The brief but unusual radio transmission was detected only once, and the debate over its origin has continued to this day. Now, a group of astronomers are claiming to have finally solved the mystery. According to their new study just published, the signal came not from aliens, but comets.

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Aliens in Hercules? Possible SETI signal detected by Russian radio telescope remains elusive

The RATAN-600 radio telescope in Russia. Photo Credit: nat-geo.ru
The RATAN-600 radio telescope in Russia. Photo Credit: nat-geo.ru

It may sound cliche, but the question ‘Are we alone?’ is still one that captures the imagination of many people, including of course, scientists. With the now regular discovery of exoplanets orbiting other stars, the prospect that there may be other intelligent life out there somewhere (or any kind of life) has only become more exciting and compelling. When it comes to intelligent extraterrestrials, SETI is a name that has become part of our modern culture, the Search for Extra-Terrestrial Intelligence. SETI focuses on looking for radio and optical signals that could originate from an advanced society, a technique that in itself has generated much debate. After several decades of searching, a definitive signal has yet to be found, but there have been tantalizing possibilities. Unfortunately, none of those have yet panned out as the signal. Now, another interesting radio signal is making the news – could it be the evidence scientists are looking for or is it another dead-end?

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The Kepler discovery controversy: objects orbiting new star likely cometary fragments, not aliens

Are the unusual objects around KIC 8462852 a giant swarm of comets or something else? Image Credit: NASA/JPL-Caltech/T. Pyle (SSC)
Are the unusual objects around KIC 8462852 a giant swarm of comets or something else? Image Credit: NASA/JPL-Caltech/T. Pyle (SSC)

There has been a lot of discussion during the past several days regarding a discovery by the Kepler Space Telescope, which, according to some, may be the first evidence for advanced extraterrestrial intelligence, or perhaps just a weird but natural phenomenon instead.

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