[Mr. K]

until we develope different propulsion I think space travel in a vacuum for 500 days with no possible rescue will be very very dangerous

I wish they would reverse engineer Bob Lazaar’s gravtiy propulsions systems he saw while working at area 51 and grrom lake

seriously, I do

[goldstategop]

A Mars expedition would have to be self contained. There's no way help can arrive from Earth for at least six months during a favorable launch window so the first astronauts to set foot upon the Red Planet would be completely on their own during that time.

"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." - Manuel II Palelologus

[Drew68]

until we develope different propulsion I think space travel in a vacuum for 500 days with no possible rescue will be very very dangerous

There were no viable rescue strategies planned for Apollo missions either. Those guys were on their own with the understanding that if something went wrong, they would be pretty much screwed.