Scientists finally solve the mystery of ‘interstellar object’ Oumuamua that astrophysicists claimed could be an alien spaceship

When the Oumuamua comet whizzed past Earth in 2017, scientists were mystified by its unusual characteristics.

Comets accelerate when they get close to the sun because, as they heat up, the ice stored inside turns to water vapour that is ejected outwards, acting as a thruster.

This expulsion of gas manifests as a dust tail or a bright halo called a ‘coma’ – yet Oumuamua had neither of these things and was still accelerating.

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