Looks at the search for planets orbiting other stars in our galaxy. We now know of over three thousand extra-solar planets and can measure what they’re like. The show explores what makes a planet “Earth-like” and takes a virtual tour of several worlds that might fit those conditions. We’ll look at planets that we used to think were science fiction, like water worlds, molten landscapes, inhabitable moons and planets with multiple suns. Includes a live update on the latest spacecraft searching for earth-like worlds.