First, develop spacecraft technology for long-duration space travel, including propulsion and life support systems designed to withstand the harsh Martian environment. Second, establish sustainable ways to produce food, water, and oxygen during the mission. Third, conceive methods for maintaining physical and mental health during the long journey. Finally, prepare equipment and plans for exploring Mars upon arrival and for the safe return journey back to Earth.
You are a renowned astronomer. Describe the steps humans need to take for a successful manned mission to Mars.