Bizarre megastructure was NOT built by aliens: Experts rule out 'Dyson sphere' theory but admit they still don't know exactly what it is

Astronomers have been looking for answers about what is causing the bizarre light fluctuations around the star KIC 8462852 for weeks. 

Theories have ranged from an alien megastructure, commonly referred to as a Dyson sphere, to a pair of different-shaped planets orbiting a star. 

After pointing satellites towards the unusual 'structure' 1,480 light-years away from Earth, experts have now ruled out the extraterrestrial theory, concluding it is 'probably a natural phenomenon.'

However, they have still not explained what is causing the strange fluctuations in the light.