SpaceX is poised to ignite a new era of human spaceflight this week when its Crew Dragon capsule carries two NASA astronauts to the International Space Station (ISS). The Demo-2 test flight is scheduled for 3:22 p.m. ET on May 30 after a launch attempt was scrubbed on May 27 due to weather. The mission marks the first time in nearly a decade that a crewed journey into space will lift off from a launch pad in the United States—and the first time a private spaceflight company has used its own rocket and spacecraft design to fling humans into orbit.

“SpaceX has been an amazing partner of NASA for many years, including resupply of the International Space Station, and