HOUSTON, When four astronauts strap into NASA’s Orion spacecraft for the first crewed lunar flyby in more than 50 years, their safety will depend not just on the vehicle but on a layered network of engineers,

The four Artemis II mission astronauts have entered the Orion capsule and are in place for humanity’s first trip to the moon in more than half a century.

The high-stakes Artemis II mission was launched from the Kennedy Space Center in Florida yesterday after multiple nervy technical issues threatened to ruin the moon voyage.