Where does Oumuamua, the mysterious interstellar flying object discovered in 2017, come from? Astronomer Robert Weryk spotted it with the help of the Pan-STARRS telescope in Hawaii. But what is Oumuamua? A comet? An artificial object? Many questions and myths surrounded this “thing from another world”. Since it was too fast to be attracted by the gravitational pull of the sun, it was clear that it came from another star system. But what exactly was Oumuamua, which means “a messenger from afar arriving first,” in Hawaiian? An asteroid? A comet? A fragment of an exoplanet, that is, a planet outside our solar system? Or even an active space probe, as Avi Loeb, director of the Harvard-Smithsonian Center for Astrophysics, has speculated?