On Aug. 28, 1993, NASA's Galileo spacecraft flew past asteroid Ida and discovered a tiny moon, later named Dactyl, the first confirmed satellite of an asteroid.
Galileo spacecraft discovers first asteroid moon during 1993 flyby
On Aug. 28, 1993, NASA's Galileo spacecraft flew past asteroid Ida and discovered a tiny moon, later named Dactyl, the first confirmed satellite of an asteroid.
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