The Polaris Dawn crew plans to conduct experiments and test technologies for Mars, including performing the first-ever commercial spacewalk."We're really starting to push frontiers with the private sector and learning new things that we would not be able to learn by staying in the risk-free environment here on Earth,

When billionaire Jared Isaacman self-funded a mission to orbit Earth in 2021, the project was billed as a childhood cancer fundraiser — and made for an eye-popping entrance into the private space tourism world.

SpaceX is about to send its human spacecraft farther than ever before in space, and it will do it with a crew of four civilians. During the five-day Polaris Dawn mission, the Crew Dragon capsule is expected to reach its highest-ever orbit of 435 miles above Earth.