Interstellar comets visit our solar system more frequently than thought

Scientists think Psyche could’ve grown as large as Mars, but its path to planethood was disrupted when another protoplanet smashed into it, ripping off its outer rocky layers and exposing its metallic core. It's the only object of its kind in our solar system.

Interstellar comets visit our solar system more frequently than thought

Interstellar Objects Might Outnumber Solar System Objects in the Oort Cloud