Well recently I made a scientific mistake that nuclear fusion engines are good for FTL as part of my story. I was wrong when I found out it only goes 10% of the speed of light. So although Alpha Centuari Proxima is 4.3 light years away, it would take around 40 Earth years to get there using NF engines according to what I researched. Would it be ion powered or anti-matter? I just need an explanation on a theorized type of engine propulsion where ships could travel at FTL to distant star systems.