Honestly that amount of mass seems doable (the hard part being a near perfect fusion engine of course). Just curious about your calculations though. Did you ta

Honestly that amount of mass seems doable (the hard part being a near perfect fusion engine of course). Just curious about your calculations though. Did you take into account the fact that you could eject spent helium and therefore lower your mass in transit? Assuming most of the mass is fuel, I would imagine by the time you're arriving there would be very little mass left to decelerate.