How Much Money Would an Earth-Like Exoplanet Really Be Worth to Us?

The prospect of finding another planet like Earth is exciting from the perspective of exploration — and our future as a species. But let's consider the bottom line. What would such a discovery really be worth for us in terms of money? Astronomy journalist Lee Billings breaks it down for you. » 12/23/14 2:00pm Tuesday 2:00pm

Five Billion Years of Solitude: Lee Billings on the Science of Reaching…

What's stopping humans from living in space? The problem isn't just a loss of political will to finance human space flight. Rocket science turns out to be rocket science - not easy, and constrained by some very real limitations dictated by material science, the physics of acceleration, and the unwieldy economics of… » 10/09/12 1:13pm 10/09/12 1:13pm