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Today in History: Mariner 10 Makes Historic Flyby of Mercury

3/29/2026

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Summary

Story summary

On March 29, 1974, NASA's Mariner 10 made history as the first spacecraft to fly by Mercury. This robotic probe, launched in 1973, provided crucial data about the planet's surface and atmosphere. Mariner 10's successful mission marked a significant milestone in space exploration, paving the way for future studies of Mercury and other celestial bodies.

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Story summary

On March 29, 1974, NASA's Mariner 10 made history as the first spacecraft to fly by Mercury. This robotic probe, launched in 1973, provided crucial data about the planet's surface and atmosphere. Mariner 10's successful mission marked a significant milestone in space exploration, paving the way for future studies of Mercury and other celestial bodies.