Scott Solomon

Right.

Yeah.

So now that we've had people that have stayed for longer flights, you know, up to a year and even a bit longer, we have been able to see that like, yeah, there are ways in which some of the systems in the body have like an initial adjustment period.

And then they start to kind of, you know, reach a plateau or they start to kind of return to normalcy.

You know, like the body, when it has all of this extra fluid in the head or more fluid than you're used to having in the head, your body interprets that as too much fluid.

And so one of the things that the body does is it starts to reduce the amount of plasma in your blood.

And so you're actually losing blood volume there.

by being in space for a longer period of time.

And you start to reduce the production of red blood cells because your body's thinking, I don't need so much blood.

And so, uh, astronauts often come back from space anemic.

Um, and that has other health implications as, as you know.

So, um, so that is something that is like an adjustment that the body makes.

And then when you come back to earth, you go through yet another adjustment.

Um,

And that's just gravity.

There's also radiation, right?

So that's something that is going to be really important for thinking about deep space, because actually what we know about how radiation affects astronauts is mostly from how astronauts are affected by being

in low Earth orbit.

So the International Space Station is in low Earth orbit.

It's, you know, orbiting the Earth, but it's close enough to the Earth that it's actually still inside the magnetic field that is surrounding our planet, which extends out quite far into space.