Space-based solar power advances with microwave and laser transmission, orbital assembly, and cost reductions, aiming for ...

A microwave-size factory now circling Earth is quietly testing whether the cleanest place to build the dirtiest part of ...

The goal is to soak up abundant clean energy in space and beam it back down to Earth. The goal is to soak up abundant clean energy in space and beam it back down to Earth. is a senior science reporter ...

As space becomes increasingly crowded, the invisible threat of orbital debris is turning into one of the biggest challenges ...