The achievement shows kinetic energy from charged exhaust particles can be converted into useful electricity, but it's still not a working commercial reactor.
The cleanest, most abundant energy source in the universe may finally be moving from science fiction to shareholder letters.
Celebrating America's 250th birthday, Space.com looks back at what our understanding of space was like in 1776 and what major ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results