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A scientific paper led by two researchers at Harvard University made a splash this week by claiming that a cigar-shaped rock zooming through our solar system may have been sent by aliens. The researchers noted in a pre-print of the article that it was an “exotic scenario,” but that “Oumuamua may be a fully operational probe sent to the earth vicinity by an alien civilisation.” ‘Artificial sail’ Oumuamua, the first interstellar object known to enter our solar system, accelerated faster away from the sun than expected, hence the notion that some kind of artificial sail that runs on sunlight — known as a light sail — may have helped push it through space. “Currently there is an unexplained phenomena, namely, the excess acceleration of Oumuamua, which we show may be explained by the force of radiation pressure from the sun,” co-author and Harvard astrophysicist Shmuel Bialy told AFP via email. “However this requires the body to have a very large surface and be very thin, which is not encountered in nature.” Their suggestion of an alien force at work went viral. But other astronomy experts aren’t buying it. “Like most scientists, I would love there to be convincing evidence of alien life, but this isn’t it,” said Alan Fitzsimmons, an astrophysicist at Queens University, Belfast. ‘Impossible to guess’ Katie Mack, a well-known astrophysicist, also took issue with the alien hype. “Scientists are perfectly happy to publish an outlandish idea if it has even the tiniest sliver of a chance of not being wrong,” she wrote on Twitter. Asked if he believed the hypothesis he put forward, Ms. Bialy said: “I wouldn’t say I ‘believe’ it is sent by aliens, as I am a scientist, and not a believer, I rely on evidence to put forward possible physical explanation.”
