Alien motherships: Pentagon official floats a theory for unexplained sightings

[Disaffected]

13. Good grief - silly Oumuamua theories again.

There is no credible evidence that Oumuamua is an alien spacecraft. Some of it seems to be a product of fevered imaginations of folks who are trying to justify their employment.

The mysterious acceleration of the object anomaly which was used to claim the thing could not be a natural phenomenon is explained by outgassing of hydrogen which can occur when an object has travelled through the extreme cold of interstellar space and is warmed by its approach to the Sun i.e. frozen hydrogen accumulated on the thing turns to gas and is expelled thus providing a thrust opposite to the direction of the Sun's radiation. This is dissimilar to what happens with "ordinary" comets in that the expelled hydrogen gas is not as visible as a normally seen comet's tail.