Key Takeaways After previous delays, SpaceX is targeting early Tuesday morning to launch Polaris Dawn, the first flight in its Polaris series of missions.The four-person crew includes two SpaceX employees,

A four-person crew of civilians is once again poised to take off on a risky — and potentially historic — mission into Earth’s radiation belts.

Four astronauts are ready to spend five days in orbit on a mission that includes the first attempted spacewalk by private astronauts.