The Mars Odyssey robotic spacecraft was launched on April 7, 2001, from Cape Canaveral on a Delta II rocket , reaching Mars orbit on October 24, 2001. As of April 2026, it is still collecting data, beyond its estimated end of 2025 propellant life.. It currently holds the record for the longest-surviving continually active spacecraft in orbit around a planet other than Earth.
What Happened in History: Browse Historical Facts on Kudos 365
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