If it is, in fact, a huge iceberg, several of the strange properties discovered on it would make sense. One of them would be its acceleration during the journey. This would indicate a process of sublimation – that is, direct passage from the solid to the gaseous state, without remaining in the liquid.
"Although this theory of the hydrogen iceberg is somewhat exotic, it explains all the mysterious characteristics of Oumuamua."
University of Chicago researcher and study co-author
It is important to note that hydrogen does not easily solidify. It would need a temperature slightly higher than absolute zero to reach that state. With a possible confirmation of the new theory, it would prove the rarity of the mysterious object.
However, the problem is due to the difficulty of proving the thesis. That's because, to get the necessary evidence, astronomers would have to intercept Oumuamua in space.
So, what's your guess about Oumuamua? Do you think it can be that rare? Tell us your opinion in the comments area.