The signal has only been observed for about a minute in total, not long enough to allow astronomers to analyse closely.
But it is unlikely to be the result of any radio interference or noise, and does not resemble an astronomical object...
"It's the most interesting signal from Setihome," said radio astronomer Dan Werthaimer from the University of California at Berkeley. "We are not jumping up and down, but we are continuing to observe it."
The signal, which has been honoured with the decidedly unexotic name SHGbo2+14a, has a frequency of about 1420MHz, says New Scientist, one of the main frequencies at which hydrogen, the most common element in the universe, absorbs and emits energy.
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