A mysterious space object named "Oumuamua" was discovered last year by the Panoramic Survey Telescope and the Rapid Response System (Pan-STARRS).
Since then, researchers have been boggled of their true nature. Its hyperbolic path indicates that it did not originate from our solar system.
It is an interloper that is unlike any asteroid or comet that has been detected earlier.
Astronomers became eager to find out more about this strangely shaped space that tumbled past the sun at high speed. There have been a lot of speculation.
Scientists said it could be an old strange relic. With some data collected, researchers explained it as a comet in June.
This week, two researchers at Harvard Smithsonian Center for Astrophysics increased the possibility that "Oumuamua" could be a strange spacecraft.
Researchers Shmuel Bialy and Avi Loeb proposed the object "may be a fully functioning probe intentionally sent to the earth's vicinity of an alien civilization."
After a careful mathematical analysis of how the interstellar object sprang up as it pushed past the sun, they said that "Oumuamua" could be a spacecraft drawn through space by the light falling on the surface – or as they put it in the paper, a "Lightail of Artificial Origin."
Many researchers have cast doubt on the "Alien Spacecraft Theory".
From Professor Matthew Kenworthy at Leiden Observatory in the Netherlands:
"It's not a strange spacecraft. It looks like a piece of rocky or icy material that has come from the outside of the solar system, passed around the sun and is now back in interstellar space."
From Seth Shostak, a senior astronomer at the SETI Institute in Mountain View, California:
"One should not blindly accept this wise hypothesis when there is also a common (and probably more likely) explanation to Oumuamua – namely, it is a comet or asteroid from the far end."
Loeb motivated his theory as "purely scientific and evidence-based" and supported his statement as follows:
"I follow Sherlock Holmes's maxim: Once you've ruled out the impossible, everything that remains, but unlikely, must be the truth."