3 ms·
No, it's because the transfer orbit with the largest payload for the thrust is only available in a specific configuration of Mars and Earth, which only happen e
by randallsquared 5y ago
No, it's because the transfer orbit with the largest payload for the thrust is only available in a specific configuration of Mars and Earth, which only happen every 26 months or so.
Note the spacing for launches for Mars missions:
https://en.wikipedia.org/wiki/List_of_missions_to_Mars https://en.wikipedia.org/wiki/List_of_missions_to_Mars