Astronomers detected repeating radio signals from 3 billion light-years aeay


Because FRBs have an extremely short duration, and because scientists usually find them in data only after the event has taken place, pinpointing their origin has not been possible. Since their discovery over 15 years ago, almost two dozen FRBs have been recorded. Nothing that we know of in that region of space could be producing these signals. Several explanations for FRBs have been suggested. One is a cataclysmic event, such as a neutron star collapsing into a black hole.

Deep space color image captured by NASA

But such an event would produce only one burst and therefore does not explain the repeating pattern of FRB 121102. Another possible explanation is that they are coming from a young, highly magnetized neutron star. The location of FRB 121102 has already been previously traced to a dwarf galaxy about 3 billion light years away. The possibility of the signals coming from an advanced alien civilization has been largely ruled out but is not completely impossible. In a such case using some form of directed energy to propel a spacecraft should be considered as the source of signals. A natural phenomenon like a pulsar seems a more likely explanation. Whatever or whoever sent out the bright radio bursts, they left their source a very long time ago when the only life here on Earth was single-celled.


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