The European Space Agency's Cluster mission is drawing to a close as its final two satellites, Samba and Tango, complete their fiery reentries into Earth's atmosphere. Samba lost contact and burned up on 31 August, with Tango due to follow the same evening, marking the end of a mission originally planned for just two years that instead ran for a quarter of a century, thanks to sustained engineering ingenuity keeping the ageing spacecraft alive well beyond their design life.

Launched in 2000 aboard two Soyuz rockets, the four-satellite Cluster II quartet studied the three-dimensional structure of Earth's magnetosphere, replacing an earlier set destroyed in the 1996 Ariane 5 launch failure. Designed to last five years, the satellites suffered battery failures after about a decade that caused them to shut down every time they passed through Earth's shadow, but engineers repeatedly devised workarounds to revive them. Science observations ended in 2024, after which controllers guided the craft towards controlled reentries over remote ocean areas — Salsa and Rumba in 2024 and 2025 respectively, followed by Samba and Tango this week — with ESA also using the final descents to study how spacecraft break apart during reentry.