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Cassini–Huygens

Space mission
Cassini–Huygens, commonly called Cassini, was a space-research mission by NASA, the European Space Agency, and the Italian Space Agency to send a space probe to study the planet Saturn and its system, including its rings and natural satellites. Wikipedia
Dates: Oct 15, 1997 – Sep 15, 2017
Lifespan: 20-year
COSPAR ID: 1997-061A
Dry mass: 2,523 kg (5,562 lb)
Last contact: September 15, 2017: 11:55:39 UTC X-band telemetry; 11:55:46 UTC S-band radio science;