How long would it take for man to go to Mars on a rocket ship?
How long would it take for man to go to Mars on a rocket ship?
user
The best estimates indicate that a human mission to Mars would take approximately 3 to 4 years to get there, and almost as long to come back, assuming that things go smoothly.
assistant
What could go wrong?
user
A lot could go wrong! A major accident in space could ruin your mission.  Also, something could go wrong with the return rocket or capsule.  It is unlikely that there would be a catastrophic failure of the rocket or the capsule, but I suppose it is possible.  Other risks include radiation and other dangers inherent in traveling long distances in space.  These could be avoided, but they would require a lot of additional work and resources, which would add significant time to the mission.
assistant
I think the crew would suffer a lot being crammed in a small ship for 3 to 4 years in space.
user