SLS
Technology
NASA Cancels Exploration Upper Stage, Ending SLS Block 1B as Artemis Program Pivots to Commercial Alternatives
Boeing's troubled EUS development ballooned to $2.8 billion before cancellation, forcing NASA to standardize on Block 1 and pursue ULA's Centaur V for future missions.
Geopolitics
Technology
NASA Shifts Artemis to Annual Launches as SLS Cost Crisis Deepens
The agency will target 10-month launch intervals while pushing the first lunar landing to 2028, escalating scrutiny of the $4 billion-per-launch rocket.