Originally denoted A/2017 U1 (with the A for asteroid), the body is now the first to receive an I (for interstellar) designation from the International Astronomical Union, which created the new category after the discovery.
According to scientists' best guesses, it's a chunk of ice covered in a shell of "dark-red carbon gunk", which has turned into an organic form of sunscreen that ensures the ice inside doesn't melt (which would transform Oumuamua into a comet).
One of the many observations of 'Oumuamua occurred at Queen's University Belfast in Northern Ireland.More news: Winter Olympics: Japanese snowboarder Yuto Totsuka in scary crash during halfpipe final
So unusual was Oumuamua, in fact, that one group of scientists made a decision to scan its surface in a hunt for alien technology.
The unusual movement of 'Oumuamua also puzzles the scientists.
The cigar-shaped object that wandered into our solar system in October was found not to be evidence of alien life - to the dismay of many - but rather just an oddly shaped rock zooming through space.
Dr Fraser explains: "Our modelling of this body suggests the tumbling will last for many billions of years to hundreds of billions of years before internal stresses cause it to rotate normally again". Most of the surface appears to be the color of dirty snow, and there's a large red spot on one side. We'd always assumed the first interstellar object would be a comet ejected from the Oort cloud at the very edge of another solar system. "This argues for broad compositional variations, which is unusual for such a small body", Fraser explained, physics.org reported. They recently published their findings in the Nature Astronomy journal.
Since 'Oumuamua was spotted in October, a team of researchers at Queen's University Belfast have been analysing the object in detail.More news: Khloé Kardashian Reveals How She Knew Tristan Thompson Was 'The One'!
"We now know that beyond its unusual elongated shape, this space cucumber had origins around another star, has had a violent past, and tumbles chaotically because of it", said Dr Fraser.
What perplexed them at first was that they didn't see behavior typical for a comet.
Dr Wes Fraser also believes that Oumuamua had a violent past, which resulted in the space rock spinning or tumbling chaotically for billions of years. Thus - although it's the first - 'Oumuamua is likely not the last known interstellar asteroid.
Scientists realized that, due to its trajectory, the object couldn't have originated in the solar system.More news: IRS warns of new scam around wrong tax refund deposits