Week in Space Data, every Friday.
Dated, frozen releases from the launch slip ledger: what really slipped, who flew on time, and how many placeholder dates rolled. Each edition keeps its URL and its numbers forever; if one is ever found to be wrong, the correction is shown on the edition beside the frozen figures and logged on /corrections. Real slips only: a placeholder such as “NET 2026” rolling to “2027” is recorded but never counted.