A mysterious Russian satellite, believed by US officials to support a nuclear anti-satellite weapon programme, is showing signs of erratic spinning in orbit – a potential setback for Moscow’s military space ambitions. Known as Cosmos 2553, the satellite’s unusual behaviour, tracked by commercial space-monitoring firms, adds a new layer of intrigue to the growing tensions over weaponisation in space.

Archived version: archive.is/…/20250425-russian-satellite-linked-to…

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