We all remember when Pluto was infamously demoted from being considered a 'planet'. But, what even is a planet? And if the definition keeps changing, will there be more planets in the future?
Evrim Yazgin is a Cosmos journalist with a Masters in Physics from the University of Melbourne. His love of science fiction has spurred an interest in all things flux capacitor to quantum-time-antimatter-inverters.
See omnystudio.com/listener for privacy information.