ʻOumuamua
Umbo lisilo kawaida lilileta maswali kama labda halina asili ya kawaida bali ni chombo cha angani kutoka ustaarabu wa nje.. Wanaastronomia Shmuel Bialy na Abraham Loeb wa Harvard Smithsonian Center for Astrophysics mjini Cambridge, Marekani waliona uwezekano ni chombo kilichotengenezwa ("possibility that it might be a lightsail of artificial origin.")