<p>On Sept. 21, 1974, the Mariner 10 spacecraft made its second flyby of Mercury, passing by the surface at a distance of just under 30,000 miles (48,000 kilometers). Launched Nov. 3, 1973, Mariner 10 was the first spacecraft sent to Mercury, as well as the first mission designed to visit two planets. (It also visited<a class="more-link" href="https://www.astronomy.com/today-in-the-history-of-astronomy/sept-21-1974-mariner-10-flies-by-mercury/">Continue reading <span class="screen-reader-text">"Sept. 21, 1974: Mariner 10 flies by Mercury"</span></a></p>
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On Sept. 21, 1974, the Mariner 10 spacecraft made its second flyby of Mercury, passing by the surface at a distance of just under 30,000 miles (48,000 kilometers). Launched Nov. 3, 1973, Mariner 10 was the first spacecraft sent to Mercury, as well as the first mission designed to visit two planets. (It also visitedContinue reading “Sept. 21, 1974: Mariner 10 flies by Mercury”
The post Sept. 21, 1974: Mariner 10 flies by Mercury appeared first on Astronomy Magazine.