Asteroid, comet or alien artefact? Interstellar object Oumuamua something else entirely, new study claims
Our solar systemâs first known interstellar visitor is neither a comet nor asteroid as first suspected and looks nothing like a cigar. A new study says the mystery object is likely a remnant of a Pluto-like world and shaped like a cookie. Arizona State University astronomers reported this week that the strange 45-metre object that appears to be made of frozen nitrogen, just like the surface of Pluto and Neptune's largest moon Triton. The unique object, named Oumuamua, was thought to be highly elongated, about 400 metres long and coloured dark red. It is the first space rock from outside...