Stuart Fox

In our exclusive Q&A, amateur space scientist Ariel Waldman talks about how DIYers can explore the cosmos without advanced degrees.

At least the Wikileaks guy meant to do it.

Solar sails are gaining popularity and could be tapped to settle an unproven theory by famed scientist Albert Einstein.

A pair of U.S. missile defense satellites has passed vital tests in space after spotting three missile test launches from orbit.

Enhanced with new data from NASA, Microsoft's WorldWide Telescope lets users make their own astronomic discoveries.

As the era of private spaceflight takes a step forward with SpaceX's Falcon 9 rocket test, here's a look at 6 companies that could launch humans into space soon.