The lost planets of our Solar System

The lost planets of the Solar System

How many planets did they teach you that there was in our Solar System? The answer they taught you was probably wrong! There has long been quests to discover hidden planets in our own patch of the galaxy, even now, when we are discovering far-flung planets in other planetary systems, the search for more of our neighbours continues. But even then, was there ever planets in our system that now no longer exist? Watch and find out!