Astronomers have discovered an intriguing fact: an object in a galaxy 500 million light years away is sending us regular, repeating radio signals.
Fast radio bursts are not uncommon in the universe — observatories have recorded more than 100 in recent years — but repeating fast radio bursts are rare. And this particular radio burst, which was first recorded in 2017, is the only one that is sending out fast radio bursts in a regular repeating pattern. The bursts come in 16.35-day cycles, with 1-2 bursts per hour over a four- day period and then 12 days of silence before starting up again.
In short, the source is like the Old Faithful of fast radio signals. And, intriguingly, at a distance of 500 million light years it’s the closest fast radio burst we’ve detected.
So, what’s causing this regular pattern of radio bursts? Scientists have come up with several hypotheses: it could be a natural radio signal-emitting object, like a neutron star or a binary system, where the frequency of the bursts is caused by the object’s wobbling or orbit or rotation.
Or, it could be aliens. There’s no way to know for sure.
It raises a serious question: if there are aliens out there, how do we know if they are trying to communicate with us, and what they are trying to say? The 16-day cycle of radio bursts could be sending a clear, friendly greeting, or an important warning, using the alien version of Morse code, with the initial bursts being the dot-dot-dashes and the 12-day interval the method of letting us know that the message is repeating. But without knowing the code, we can’t decipher the meaning — or even recognize the radio bursts as a message in the first place. It’s similar to the inability to decipher ancient hieroglyphics until the Rosetta Stone was discovered.
It reminds me of a passage from Kurt Vonnegut’s Breakfast of Champions:
“As for the story itself, it was entitled “The Dancing Fool.” Like so many Trout stories, it was about a tragic failure to communicate. Here was the plot: A flying saucer creature named Zog arrived on Earth to explain how wars could be prevented and how cancer could be cured. He brought the information from Margo, a planet where the natives conversed by means of farts and tap dancing. Zog landed at night in Connecticut. He had no sooner touched down than he saw a house on fire. He rushed into the house, farting and tap dancing, warning the people about the terrible danger they were in. The head of the house brained Zog with a golfclub.”
Unfortunately, a mysterious repeating radio signal is no more understandable than the farting, tap-dancing Zog.