A new theory about 'Oumuamua suggests the weird object that passed through our solar system in 2017 was a remnant of a Pluto-like world from another solar system. As one scientist said, "‘Oumuamua may be the first piece of an exoplanet brought to us."
Read MoreComputer simulations confirm that 'Oumuamua - an object from another star system that sped near our sun in 2017 - likely formed via a close encounter with its star. 'Oumuamua may have originated in a debris disk, they said, or even a shattered super-Earth.
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