We already are. Instead of gravity, magnetic fields are used to compress hot plasma and cause it to reach very high temperature levels to allow fusion. Tempera

We already are. Instead of gravity, magnetic fields are used to compress hot plasma and cause it to reach very high temperature levels to allow fusion. Temperature is basically atomic/molecular movement and the more energetic the movement the more likely that crashing nuclei will react and fuse. There are currently two major magnetic field designs: - Tokamak, such as ITER [1] - Stellerator, such as Wendelstein-7X [2] [1] https://en.wikipedia.org/wiki/ITER https://en.wikipedia.org/wiki/ITER [2] https://en.wikipedia.org/wiki/Wendelstein_7-X https://en.wikipedia.org/wiki/Wendelstein_7-X