Well I mean going to Mars isn't that hard per se, a fair few countries have done it... but carrying enough supplies and shielding to last people 2 years until the return trip and then actually getting back are way harder problems.
Seeing Starship get burnthrough on these suborbital launches really shows how hard it'll be to do Mars return entry with a fair few extra km/s.
Seeing Starship get burnthrough on these suborbital launches really shows how hard it'll be to do Mars return entry with a fair few extra km/s.