How to get people from Earth to Mars and safely back again
Brisbane, Australia (The Conversation) Dec 23, 2020
There are many things humanity must overcome before any return journey to Mars is launched. The two major players are NASA and SpaceX, which work together intimately on missions to the International Space Station but have competing ideas of what a crewed Mars mission would look like. The biggest challenge (or constraint) is the mass of the payload (spacecraft, people, fuel, supplies
