The first interstellar object to visit the solar system may have been a fragment of an icy exoplanet, research suggests.
When 1I/'Oumuamua was first spotted in 2017, astronomers quickly determined that it came from outside the solar system. But although it was initially classified as a comet from another star system, it may actually be the skin of an "exo-Pluto," a completely unexpected class of Pluto-like objects anticipated to visit the sun.
