Originally posted by Murcielago
A Russian astronaut has a record of over 2 years in space and he's fine. long as you work out while on board the ISS or the moon you wont loose much
bone and muscle loss. Nasa has never had a astronaut in space for over 1 year, just to play it safe (and keep there astronauts from going insane).
every month you lose roughly 1% of you total bone mass. that's a lot. you can take calcium supplements, but at a certain point they seriously
increase the risk of heart failure/attack. It end sup not being a feasible option. Exercise helps, but not nearly enough.
Asthenia (the feeling you get in space from being lonely) is no small problem. It a huge issue we have to contend with, especially on a long journey
to mars.
the problem with nuclear power is a few things.
1. people are inherently scared of em, and for relatively good reason. who the hell wants a nuke strapped to their butt?
2a. should something go wrong, the effects on earth would be devestating
2b. should something go wrong in space, not a single thing would be salvageable, although other effects would be minimalized
2c. should something go wrong on or near any planet, the effects would be devestating as well. if were lucky, itll work out. we wouldnt be able to
reach it to do much, and the chances of ruining our shots at the planet are high, especially since we'd need a powerful nuke.
3. its dirty
4. its expensive
5. we get there. then what? youve still got a nuke.
i remember reading somewhere here, though, about the navy testing or thinking about doing tests with nuclear power in space w/ NASA. a number of
people, including me, were adamently opposed as i recall. i say keep the stone age here. lets save the good stuff for space.