Comet, Meteor or Alien Spacecraft

Since its first sighting in 2017, “Oumuamua” has puzzled scientists and researchers. Its strange propulsion-like movement and determined trajectory call into question whether the long, flat object is merely a comet or a meteorite—despite that being the more mundane, and maybe likely, conclusion. The way the object sped up as it passed the sun has researchers most puzzled. “Lightsails,” the solar-powered starships that Breakthrough Starshot plans …