To most people, planets are one of the most familiar of astronomical objects. After all, we do live on one. But how do these massive spheres get their start? Tune in to learn more about the birth of planets -- including our own -- in this podcast.
Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htm
And to learn about your ad choices when listening to podcasts, visit
https://www.howstuffworks.com/privacy.htm#ad-choices
