Originally Posted by https://nbodypolitics.gitlab.io/2017/11/29/interface_propulsion.html
Last time, we talked about FTL travel. However, to be able to FTL-travel, we still need to leave that pesky gravity well behind - and at roughly 9.4km/s, it’s a doozy. Just looking at today’s rockets, mass fractions and propellant densities make multi-stage rockets necessary. But how does it look like in the future?