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.

Veteran NASA astronaut Suni Williams announced her retirement Tuesday. Her extended mission to orbit due to the troubled Boeing Starliner test flight was her final foray.

(CNN) — A Blue Origin rocket will soon launch carrying an unconventional passenger in a history-making moment made possible by a high-profile former employee of the company’s biggest rival. Michaela ...

(CNN) — Michaela Benthaus, a 33-year-old German aerospace and mechatronics engineer at the European Space Agency, just became the first wheelchair user ever to travel past the Kármán Line — a common ...