If you want to send something deep, deep into space, it's impractical to load it up with lots of heavy propellant. Scientists with their eyes on long-distance space travel have contemplated thrusters that wouldn't need any propellant at all. The EmDrive, a copper cone that would supposedly push forward on the vacuum of space without any propellant, is one such idea — unfortunately, it's probably another dead end.
Tagged With emdrive
I can’t help but be excited about the EmDrive, the experimental space propulsion system that seems to defy the fundamental laws of physics. A peer-reviewed paper has just been released, and, despite many physicists expecting this paper to finally kill the EmDrive puzzle, the opposite has happened: the paper found that the drive does, in fact produce thrust. It’s just that nobody seems to know how. Or why. I asked our tame physicist to help us figure this out.