Astronomers have spotted the brightest fast radio burst ever recorded - and they say it will help finally pinpoint the source of the strange 'alien signals'. 

Fast radio bursts are brief, bright pulses of radio emissions and they have baffled astronomers for almost a decade.

Since they were first found in 2007, scientists have been unable to determine the origin of the radio emissions, which last just a few milliseconds. 

Some claim they may be a message from ET, while others suggest they are created by a neutron star cocooned by a strong magnetic field.

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