Every time these discussions come up, people immediately come up with &quot;other&quot; suggestions for landing.<p>Parachutes, &quot;catching&quot; devices, etc. etc.<p>It all comes down to one thing, and one thing only.<p>Whatever the solution, it has to work on other planets with no infrastructure on that planet, and it has to leave the booster in a state that it&#x27;s ready to go again with only a fuel fill up.