In recent years the numbers of Exoplanets being discovered has skyrocketed. 

We have a number of methods to detect these new worlds but for the most part they involve observation of the accompanying star in the system.

But what if there is no Star? Just how many planets are out there going it alone and how do we go about finding them?

Ethan Siegel is an astrophysicist and science writer and he joins me now...

First Aired: 31/03/2018