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Å tro at denne "speed boosten" som Oumuamua fikk har naturlige årsaker fordi det er en komet er vel litt naivt vil jeg mene. Hadde den vært større så hadde det kunne gitt mening, men når den er så liten OG det ikke er noen tegn på gasser så er det vel lite trolig.

"Our high-precision measurements of ′Oumuamua’s position revealed that there was something affecting its motion other than the gravitational forces of the Sun and planets"

"Analyzing the trajectory of the interstellar visitor, co-author Davide Farnocchia of the Center for Near Earth Object Studies (CNEOS) at NASA’s Jet Propulsion Laboratory (JPL) found that the speed boost was consistent with the behavior of a comet.

“This additional subtle force on ′Oumuamua likely is caused by jets of gaseous material expelled from its surface,” said Farnocchia. “This same kind of outgassing affects the motion of many comets in our solar system.”"

"Comets normally eject large amounts of dust and gas when warmed by the Sun. But according to team scientist Olivier Hainaut of the European Southern Observatory, “there were no visible signs of outgassing from ′Oumuamua, so these forces were not expected.”"

https://www.nasa.gov/press-release/o...ed-speed-boost

EDIT: Får vel legge til at det også er litt av en tilfeldighet at den skal få en speed-boost tilsvarende at den flyr rett ved jorden.

"'Oumuamua had been boosted by 25,000 miles (40,000 kilometers) compared to where it would have been if only gravitational forces were affecting its motion."

"The team estimates that ′Oumuamua’s outgassing may have produced a very small amount of dust particles – enough to give the object a little kick in speed, but not enough to be detected."
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Men det er vel også en mulighet for at dette er ett materiale med ekstraordinære egenskaper som vi ikke har sett før?