Unexplained interstellar visitor Oumuamua could be lost piece of an exoplanet
Oumuamua’s origin has been hotly-debated. A new study proposes it’s an exploded chunk of a Pluto-like planet. Ever since we were visited by Oumuamua, the first interstellar object we found wandering through our solar system, scientists have been captivated by it. It’s a puzzling cosmic...