Oumuamua: what was mysterious cigar-shaped interstellar object?

New study dismisses alien spaceship theory

interstellar_asteroid.jpg
Artist’s concept of ‘Oumuamua 
(Image credit: European Southern Observatory/M. Kornmesser)

Scientists investigating a cigar-shaped interstellar object spotted almost two years ago have ruled out theories that it was an alien spaceship - but admit they still don’t know how to classify the vast chunk of rock.

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