u/RabidTowel

So, Rocky gave Grace 2 million Kg of fuel to help him get back to earth but that also meant Rocky’s trip would take an additional 6 years for himself. So when Grace decides to save Rocky instead of going home, how come they were able to still reach Rocky’s planet on the Hail Mary when Grace only had enough fuel to make a 4 year journey (to earth), never mind a 6 year one to Rocky planet.
Apologies if I’m sounding dumb, it just didn’t make sense to me, unless I’m missing something obvious.

Thank you