Canadian astronomer Robert Weryk discovered ʻOumuamua (depicted), the first known interstellar object detected passing through the Solar System. Robert Weryk: Robert J. Weryk is a Canadian physicist and astronomer. He currently works at the University of Hawaiʻi at Mānoa, where he discovered the first known interstellar object, ʻOumuamua. He has also published numerous articles on meteors and other astronomical topics. October 19, 2017. Wiki link