The Strange Movement of 'Oumuamua: Hydrogen or Alien Technology?

A new study suggests that the non-gravitational acceleration of the interstellar object 'Oumuamua could be explained by the ejection of H2 molecules from radiolytically produced H2O ice. The study proposes that the object was composed of molecular hydrogen ice, which was ejected due to cosmic ray bombardment, causing the acceleration. This theory is supported by previous observations of H2 in interstellar and extragalactic ices and the ejection of H2O, O2, H2, and H from water ice by ion bombardment.