The boundary between space and the earth is purely arbitrary. And I'll probably always be interested in this planet - it's my favorite.
Voyages to the outer solar system are controlled from a single place on the planet Earth, the Jet Propulsion Laboratory (JPL) of the National Aeronautics and Space Administration in Pasadena, California.
In science we may start with experimental results, data, observations, measurements, ‘facts'. We invent, if we can, a rich array of possible explanations and systematically confront each explanation with the facts.
I'm frequently asked, Do you believe there's extraterrestrial intelligence? I give the standard arguments—there are a lot of places out there, the molecules of life are everywhere, I use the word billions, and so on.