Astronomers may have found giant alien 'megastructures' in space more than fourteen hundred light years or eight and a half quadrillion miles away from Earth.

The irregular light coming from a star near the Milky Way "suggests there's something passing in between us and that star" says Dr Jen Gupta, astrophysicist and science communicator at Portsmouth University.

She does stress however that it is "very unlikely that it is aliens" but says "it is a complete mystery what's going on".

This clip is originally from 5 live Breakfast on Saturday 17th October 2015.