Earlier quoted context omitted.
Mars??? That’s more than a bit of a stretch. The astronauts in the ISS right now weren’t up there for a significantly longer period of time compared to their peers. Absolutely no way it would disqualify them from a mission happening a decade from now which is an absolute best case scenario for mars and frankly even the moon the way the current political climate is in the US.
> Absolutely no way it would disqualify them from a mission happening a decade from now Astronauts have lifetime radiation limits. Crewed Mars missions already push the envelope; the margins are especially meaningful.
They’ll be too old to participate in the mars mission a minimum of a decade from now.
You have literally no idea what the radiation exposure allowances will be for a manned mission to mars when it happens, or what advancements we’ll make to radiation shielding should we ever actually send a manned mission to mars.