Serious question

[malaise]

How long does it take an astronaut to readjust to matters gravity?
They’ll be back on planet earth tomorrow around this time.

[no_hypocrisy]

1. I heard it was a half-week or a little more.

It's the equivalent of decompression when you are underwater. You don't want the astronauts to get sick from gravity and stuff.

[malaise]

2. Underwater as in a submarine?

Interesting

[no_hypocrisy]

3. Like that. The "Bends" is real. You have stomach spasms that make you want to die.

Or deep-water scuba-diving.

Decompression sickness (DCS; also called divers' disease, the bends, aerobullosis, and caisson disease) is a medical condition caused by dissolved gases emerging from solution as bubbles inside the body tissues during decompression. DCS most commonly occurs during or soon after a decompression ascent from underwater diving, but can also result from other causes of depressurization, such as emerging from a caisson, decompression from saturation, flying in an unpressurised aircraft at high altitude, and extravehicular activity from spacecraft. DCS and arterial gas embolism are collectively referred to as decompression illness.

(Disclaimer: I learned about The Bends on Flipper in the Sixties when Sandy had a bad case of them.)

[malaise]

7. Thanks

and LOL for Flipper 😀

[malaise]

9. Heard a good discussion here

https://democraticunderground.com/100221163483

[usonian]

4. For long trips there are lasting effects. I or someone else will post.

I guess an anti-gravity bed might help.

Looking now.

[dalton99a]

5. Supposedly one day of recovery for one day in space

[cbabe]

6. The eyes have it! Scientists focus in on how microgravity changes astronaut vision

https://www.space.com/microgravity-vision-effects-astronauts

The eyes have it! Scientists focus in on how microgravity changes astronaut vision

By Leonard David published April 2, 2023

After decades of collecting data about how astronauts' vision is affected by spaceflight, scientists have identified a set of microgravity-induced changes to the human eye known as Spaceflight-Associated Neuro-Ocular Syndrome, or SANS. This condition is considered a risk to human health in long-duration spaceflight.

…

Overall, clarity over vision issues in space has come a long way since the February 1962 flight of Mercury astronaut John Glenn. That first three-orbit spaceflight by an American had Glenn dutifully monitoring his vision by reading an eye chart to see if his eyeballs might change and alter his vision.

… more …

(Something I never thought of.)

[malaise]

8. Thanks

[Polybius]

10. Depends how long they are gone for

These guys were only out of orbit for like 10 days. Although a lot closer, some astronauts on the ISS have gone over a year there, so it will take much more time to readjust.

[a kennedy]

11. and how about the two Astronauts in the space station for 9 months???

Still would love to hear they’re ok.