The European Space Agency's Cluster mission is concluding its operations after a remarkable 26-year run. The quartet of spacecraft, which has provided invaluable data on Earth's magnetosphere, is preparing for its final maneuvers. This extended mission is a testament to the robust engineering and successful operations that have allowed the probes to far exceed their planned lifespan. AI
RANK_REASON The cluster describes the conclusion of a long-running scientific mission, which is a research milestone. [lever_c_demoted from research: ic=1 ai=0.0]
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