Titan vs Ganymede: Which Is The Largest Moon?

Some moons are bigger than planets, and Titan is aptly named, long believed to be biggest moon, but should it or Ganymede around Jupiter hold that title? And where to do planets, moons, and stars begin and end?

Produced, Written & Narrated by: Isaac Arthur
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator