Space sickness question

How long does it take for an astronaut on his first flight to get used to 0g ?

I was under the impression that after a couple of days, most astronauts would
be used to 0g.

However, the response from a ground request to speak to one of the crew
members was "he is presently indisposed", and the message to him was that SG2
had been privatized for his PMC (private medical conference).

Are there previous examples of space sickness lasting more than 2-3 days ?

For a 9 day mission, is it fair to assume that the only medical problems one
could expect to get is just stomach problems ? Wouldn't tests done prior to
launch pretty well rule out any other disease that would appear just a couple
days after launch ?

On or about Sat, 24 Apr 2004 04:43:23 -0400, John Doe made the sensational claim that:
However, the response from a ground request to speak to one of the crew
members was "he is presently indisposed", and the message to him was that SG2
had been privatized for his PMC (private medical conference).

Maybe he was using some of toilet paper you're so obsessed with.
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"John Doe" wrote in message ...
How long does it take for an astronaut on his first flight to get used to
0g ?

I was under the impression that after a couple of days, most astronauts
would
be used to 0g.

However, the response from a ground request to speak to one of the crew
members was "he is presently indisposed", and the message to him was that
SG2
had been privatized for his PMC (private medical conference).

Are there previous examples of space sickness lasting more than 2-3 days ?

For a 9 day mission, is it fair to assume that the only medical problems
one
could expect to get is just stomach problems ? Wouldn't tests done prior
to
launch pretty well rule out any other disease that would appear just a
couple
days after launch ?


I think that one of the Skylab astronauts was nauseous for most of his
two-month stay.

Nathan

I think that one of the Skylab astronauts was nauseous for most of his
two-month stay.

Nathan

Imagine the horror if it were a one year ISS stay
HAVE A GREAT DAY!

(bob haller) writes:

Imagine the horror if it were a one year ISS stay
HAVE A GREAT DAY!

Better to find out in LEO that you can't cut it for a year than to
find out on the first Mars mission that one of your crew is going to
be sick for *two* years.

Besides, if things get too bad, that's what Soyuz is for. Medical
evacuation of ISS is one reason it's there. Again, better to
experience this in LEO.

For Mars missions, you'll want to only send seasoned astronauts who
have experience in microgravity for extended periods of time. In
other words, year long missions.

Jeff
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(bob haller) writes:
Imagine the horror if it were a one year ISS stay
HAVE A GREAT DAY!

jeff findley wrote in message ...
Better to find out in LEO that you can't cut it for a year than to
find out on the first Mars mission that one of your crew is going to
be sick for *two* years.

Besides, if things get too bad, that's what Soyuz is for. Medical
evacuation of ISS is one reason it's there. Again, better to
experience this in LEO.

Well... That is only to test the effects of micro G enviroment on
people.

For a one year stay in LEO, similiar experiments has been done on Mir,
but only for up to 1,2 year.

But, the problems of spaceflight to Mars would be more than micro G
enviroment, and it would also be beyond physical problems, it would
also includes mental problems and social problems.



To test a Martian flight in LEO, several things need to be done (minus
interplanetary radiation, interplanetary hazards, and so on), like:

- Don't let the astronauts view Earth.

- Don't send regular supplies to the astronauts.

- Don't give escape capsule to the astronauts.

- Put the astronauts on the same kind of vessel that would be use on a
Martian flight.

- Give the astronauts the same kind of food that will also be given in
a Martian flight.

- Put time delays on the communication systems.


For Mars missions, you'll want to only send seasoned astronauts who
have experience in microgravity for extended periods of time. In
other words, year long missions.

One year long mission in LEO is doneable, around two year long mission
to Mars on the other hand is not known.

The ideal time length of the mission should be three months, the same
amout of time submarine crew spent on their mission. But the current
published official technology would only allow a mission capable of
achieving a seven months time span (three months to Mars, one month on
Mars, three months back to Earth).

Jeff

(EAC) writes:

But, the problems of spaceflight to Mars would be more than micro G
enviroment, and it would also be beyond physical problems, it would
also includes mental problems and social problems.

You can test this cheaply on the ground. Better yet, ask the US Navy
what happens on subs when they're at sea for the better part of the
year. They're under similar conditions with cramped quarters, no
windows, no family, and limited communications with the "outside
world".

To test a Martian flight in LEO, several things need to be done (minus
interplanetary radiation, interplanetary hazards, and so on), like:

- Don't let the astronauts view Earth.

- Don't send regular supplies to the astronauts.

- Don't give escape capsule to the astronauts.

- Put the astronauts on the same kind of vessel that would be use on a
Martian flight.

- Give the astronauts the same kind of food that will also be given in
a Martian flight.

- Put time delays on the communication systems.

There isn't a single thing on this list that you can't do on the
ground. Stick the "crew" in the mock-up and lock the door with a time
lock. They won't be getting out for the duration of the mission.

Again, the only thing we really need to know from tests in LEO is how
the body reacts to microgravity and how to counter the negative
effects. We can do that *now* on ISS.

For Mars missions, you'll want to only send seasoned astronauts who
have experience in microgravity for extended periods of time. In
other words, year long missions.

One year long mission in LEO is doneable, around two year long mission
to Mars on the other hand is not known.

A mission to Mars using minimal fuel takes far longer than you say
below. A quick search turns up trip times of about 260 days to and
from Mars (textbook Hohmann Transfer both ways). That's nearly nine
months to Mars and nine months back. This doesn't count the time
spent on the surface, which could be either relatively short (three to
four months) to very lengthy (15 months), because you have to
wait for the Earth and Mars to be in the proper alignment before you
begin your trip back.

Here are a few quick references:

http://web.mit.edu/12.000/www/finalp...traj/free.html
http://www.astronomycafe.net/qadir/q2811.html
http://vulcain.fb12.tu-berlin.de/koe...q/july_97.html

The ideal time length of the mission should be three months, the same
amout of time submarine crew spent on their mission. But the current
published official technology would only allow a mission capable of
achieving a seven months time span (three months to Mars, one month on
Mars, three months back to Earth).

As has been pointed out by a resident submarine expert, not all
submarine types are limited to three month missions. In times of war,
I'm sure mission times can be stretched beyond what's normal in
peacetime. Similarly, to get to Mars, we're going to have to stretch
human endurance in space.

Jeff
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EAC wrote:
For a one year stay in LEO, similiar experiments has been done on Mir,
but only for up to 1,2 year.

Just because you've done a extended stay once or twice doesn't mean you don't
need to do it again. You need to do these experiments until you have found a
way to keep the bodies in usable shape when they get back into a gravity environment.

In other words, it isn't enough to find the problems caused by 0g stays, it is
just as important to find and test the solutions to the problems.

- Don't let the astronauts view Earth.

A mars ship would be able to view earth as it goas away, and view mars as it
approaches, and on its way back home, they've be able to view earth as it
grows bigger. That would probably be a great big morale booster.

- Don't send regular supplies to the astronauts.

So, they won't get fresh oranges. But if their supplies are "containerized",
then at regular intervals, it will be like a new progress coming in when they
close and jettison one container and then open up another one and stard
digging into its supplies.

- Don't give escape capsule to the astronauts.

I don't think that this is such a big deal. If the experiment fails, they
should be able to go back to earth from Alpha. The whole point of this is to
learn, not to kill people.

- Put the astronauts on the same kind of vessel that would be use on a
Martian flight.

Agreed. That is why in my opinion, such a mars ship should be built in orbit,
attached to ISS, and lived-in for a long enough period to work out the kinks.

jeff findley wrote:
Again, the only thing we really need to know from tests in LEO is how
the body reacts to microgravity and how to counter the negative
effects. We can do that *now* on ISS.

I would suggest that another is maintenence and repair of complex
machinery in microgravity. The recent breakdown and repair of the TVIS
is a great example of pushing the envelope on the sorts of procedures
which can be performed in space. The one thing I think we can take for
absolute certain about a mission to Mars is that something, sometime,
is going to break. Mass constraints will prevent us from having spares
for absolutely everything, so sooner or later we'll have to repair
rather than replace. In an extreme case, has anyone contemplated
zero-G machining and metal casting? Not that I'm suggesting turning
the ISS into a flying metal shop, but I don't think the above is
something we can entirely figure out down here in 1G.

- Marshall

But, the problems of spaceflight to Mars would be more than micro G
enviroment, and it would also be beyond physical problems, it would
also includes mental problems and social problems.



The unknown is the biggest one. thats why we need a moonbase first, to find out
more about group dynamics in a closed environment.

we also need nuclear propulsion. with a travel time of 18 months 9 each way
consumables will be unbelievable. cut the travel time to 6 months round trip
makes it so much better and easier
HAVE A GREAT DAY!