This could have been the result of cometary outgassing, but there is no evidence for a cometary tail around it.
He also lamented that mankind now lacks the technology necessary to chase Oumuamua for a closer study, as the rock's point of origin makes it very fascinating for researchers.
More specifically, they believe 'Oumuamua is, in reality, a "light-sail spacecraft".
This left the authors, Avi Loeb and Shmuel Bialy, with two explanations: either 'Oumuamua was debris from the interstellar equipment of an advanced alien civilization, or it was a live probe, sent to observe Earth.More news: Newfoundland woman searching for family missing in Northern California
Was last year's sighting of 'Oumuamua - a mysterious, 400-foot-long, "cigar shaped" object that hurtled past Earth - evidence of an advanced alien civilization from outside the Milky Way Galaxy?
The cigar-shaped space rock which was designated as a comet by astronomers is apparently the first known object from another solar system to pass through our own.
Bialy and Loeb dismissed the outgassing explanation as causing 'Oumuamua's inexplicable acceleration.
When comets are warmed by the Sun, they usually eject gas and dust which form a cloud of particles around it, called a coma along with the tail, which is a characteristic feature.More news: Defense Secretary Mattis plans to visit U.S.-Mexico border
However, the sharp acceleration of the object was also deviating.
Formally designated 1I/2017 U1, 'Oumuamua was discovered by Robert Weryk using the Pan-STARRS telescope at Haleakala Observatory in Hawaii, on October 19, 2017, or 40 days after it passed its closest point to the Sun.
Abraham Loeb, from the varsity, said, The new object showed very unusual features since its discovery. It has a unusual shape, doesn't show the characteristics usually observed in comets and asteroids, and is flying through space in a way that scientists wouldn't expect it to, he said. Unable to agree, they made 'Oumuamua the first member of a new class of thing.
The study noted that red, dark elongated object, which is ten times as long as it is wide and travels at a speed of 315,364 km per hour, might be artificial, as reported by Xinhua news agency.More news: Wayne Rooney's Wembley farewell sparks rush for tickets