CNN  —  The dream of nuclear fusion has been chased by some of the world’s brightest minds for decades. It’s easy to see why — replicating the inner workings of stars here on Earth would mean virtually unlimited clean energy. Despite a long history of attempts , and several breakthroughs , the dream hasn’t turned to reality yet, and we’re likely many years away from seeing a fusion power plant anywhere on the planet. Carrying out the process in space might sound like adding an extra layer of