Insult My Intelligence

2. What on Earth is Planet 9?

Tim Dowling Season 1 Episode 2

This week on Insult My Intelligence, Tim tackles his vast ignorance about the far edges of our solar system. He always thought Pluto was Planet 9 — but spoiler: it’s not. So is there a real ninth planet out there? To find out, Tim talks to Konstantin Batygin, the scientist behind today’s Planet 9 hypothesis, and astronomer Samantha Lawler, who has her doubts.