Astronomers discovered an asteroid last year, "Oumuamua, who traveled through our solar system after arriving from another star." While a cigar-shaped asteroid passed through our solar system, scientists began to believe that asteroids could come from far away and then remain. Experts still they are debating the discovery, and the newer theory from Harvard & # 39; s Smithsonian Center for Astrophysics, Shmuel White & # 39; and Abraham Loeb, says that "Oumuamua could have been sent by aliens to explore other galaxies.
Professor Loeb told Universe Today: "We will explain the excess of acceleration" Oumuamua away from the sun as a result of the force that sunlight exerts on its surface.
"In order for this force to explain the measured excess acceleration, the object must be very thin, in the order of a fraction of a millimeter thickness, but tens of meters.
"Thanks to this the object is light due to its surface and allows it to act as a light sail.
"Its origin can be either natural (in an interstellar medium, or proto-planetary discs) or artificial (as a probe sent on a reconnaissance mission to the inner space of the Solar System)."
However, the astronomer who discovered the asteroid, Robert Weryk, criticized the theory of strangers, calling it "wild" and "exotic".
Mr. Weryk said CBC's Afternoon Drive: "I think it is a remnant of a different solar system. It's just something that happened in us, and we were lucky that we were operating the telescope that night and we were looking in that direction.
"Theoretically, they have been predicted for decades, but we have never seen them until we see the next one, there are many questions that we can not answer."
Other astronomers also criticized Prof Löb's theory.
Alan Fitzsimmons, astrophysicist at Queens University in Belfast, said recently: "Like most scientists, I would like to have convincing evidence of the existence of a strange life, but this is not it.
"It has already been shown that the observed features are compatible with a comet-like body ejected from another stellar system.
"And some of the arguments in this study are based on numbers with great uncertainty."
Katie Mack, astrophysicist from North Carolina State, also had a problem with this theory.
She wrote on Twitter: "What you have to understand is: scientists are completely happy to publish a bizarre idea if they have the smallest faction of chance that they will not be wrong.
"But until every other possibility has been exhausted a dozen times, even the authors probably do not believe it."
It is believed that the bizarre cosmic-shaped cosmic rock has been wandering among the stars for hundreds of millions of years and is the first foreign object that can be seen in our Solar System.
"Oumuamua is about 400 meters long and is dark red." It was spotted by the Pan-STARRS1 telescope in Hawaii on October 19, 2017. Traveling at around 95,000 kilometers per hour.