NASA officially retired the MAVEN mission following an unrecoverable communication failure. During its eleven years orbiting Mars, the spacecraft provided groundbreaking insights into atmospheric sputtering, solar wind interactions, and exactly how the Red Planet lost its early habitable climate forever.
Click to View MoreLaunched in 1977, NASA’s Voyager 1 is humanity’s longest-running spacecraft. They explored the outer planets, including Jupiter and Saturn, before entering interstellar space.
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