07-21-2018, 05:37 PM
(This post was last modified: 07-21-2018, 05:37 PM by stevebowers.)
I used (pre-calulated) Hohmann transfer orbits from a table to calculate a plausible date for the first manned landing on Mars; they are useful in certain circumstances. In a technologically advanced civilisation like OA, powered transfer would probably be most important for most purposes.