NASA’s return to crewed lunar flight is now hinging on a slab of material at the bottom of Orion that did not behave the way engineers expected. Instead of a straightforward fix, the agency is ...

In deep-space travel, sometimes the most important “hardware” is a few inches of material that only matters for minutes. The Artemis II mission will orbit four astronauts around the Moon and return ...

As the four-person crew of Artemis II prepares to launch on a historic mission around the moon as soon as February, some experts are worried about the Orion spacecraft’s heat shield.