Astronauts Could Survive Mars Radiation, Curiosity Rover Finds

but will their eyes bulge out like arnolds did? we need to know these things.

The real question is can they survive the transit in between planets while outside of Earth's protective magnetic field?

If there were a severe solar flare or CME, things might get serious within a few minutes.

Solutions have been proposed with metallic shielding or water shelters, but the practicality of both is in question. Recent research has shown that metallic shielding poses it's own problems- particles are absorbed, but then beta particles from the metallic shielding itself are split apart causing more problems than the initial radiation in the first place, since the effect is multiplied.

Water seems to provide sufficient neutron shielding, but the plan that NASA has proposed is in my opinion impractical- taking up much space and weight aboard the spacecraft.

Not only that, but the chance of hitting any type of debris in space is a major cause of concern. A beebee sized rock would produce a catastrophic collision.