A ring or sphere could, apparently, be stable if surrounded by the right sizes and gravities of other stars.

Solar sailing, the most common version ... but even understanding how the physics of a light sail will work over such large distances is difficult. So, the researchers at Caltech, led by postdoc ...

NEW ORLEANS — Solar sails that allow satellites to glide on the light from the sun could soon become a reality. The technology would allow scientists to provide earlier warnings of space weather ...