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Orbiting spacecraft could be refueled with water taken from planetoids—but some experts doubt the economics.
Moon and Mars missions are scrapped, but radical new technology gets funding.
If we can’t adequately reduce or sequester carbon emissions, are more-radical alternatives like orbital mirrors a solution to climate change?
Tests prove the feasibility of using nuclear reactors to provide electricity on the moon and Mars.
Reduced government funding could scuttle some projects.
NASA’s new ion-propulsion system could be ready for launch as soon as 2013.
The supply of new spacecraft, launchers, and spaceports could soon exceed the demand.
The next few years will see at least two new commercial spacecraft put into orbit.
This year’s Lunar Lander Challenge could provide the innovative approach that makes space tourism a reality.