Closing out a 25-day voyage around the moon, NASA’s Artemis 1 spacecraft closed in on Earth Saturday, on track for a 25,000-mph re-entry Sunday that will subject the unpiloted capsule to a hellish 5,000-degree inferno before splashdown off Baja California. Testing the Orion capsule’s 16.5-foot-wide Apollo-derived Avcoat heat shield is […]