I can't get involved.

There's also something a little farther out, called the Oort cloud.

Beyond Neptune lies the Kuiper Belt, and finally the Oort Cloud, which may extend as far as a light year.

You'll find millions or trillions or billions of objects which, in what we call the Kuiper Belt or the Oort Cloud these are clouds of small objects which appear as comets when they fall close to the Sun.

Physicist Freeman Dyson suggests that we start looking for life on the moons of Jupiter and out past Neptune, in the Kuiper belt and the Oort cloud. He talks about what such life would be like and how we might find it.