Over the last two decades, Les Johnson and his team of engineers have quietly been pushing NASA into a new era of space exploration while nobody was paying attention. As an engineer at the legendary ...

The solar-powered explorer yacht Helios 11 could "run forever" with solar energy, in theory.

Boaters coming and going in Petersburg’s North Harbor may have noticed a new visitor this weekend. David Borton and his son, Alex, sailed from Bellingham, Washington, in a 27-foot solar-powered boat.

Add Yahoo as a preferred source to see more of our stories on Google. Video shows NASA's futuristic solar sail technology prototype. Like a sail on the ocean propels a boat with the wind, this space ...

Nasa has unfurled a solar sail in space for the first time, aiming to harness the propulsive power of sunlight for interstellar travel. The US space agency revealed that it had deployed the solar sail ...

Like a regular sail uses wind to navigate across an ocean, solar sails use the pressure exerted by sunlight to move through space. (Pictured: a conceptual illustration of a diffractive solar sail) ...