{"id":606342,"date":"2026-08-27T15:56:15","date_gmt":"2026-08-27T15:56:15","guid":{"rendered":"https:\/\/www.newsbeep.com\/ie\/606342\/"},"modified":"2026-08-27T15:56:15","modified_gmt":"2026-08-27T15:56:15","slug":"on-this-day-in-space-aug-27-1962-nasa-launches-mariner-2-to-venus-for-ambitious-flyby","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/ie\/606342\/","title":{"rendered":"On this day in space! Aug. 27, 1962: NASA launches Mariner 2 to Venus for ambitious flyby"},"content":{"rendered":"

On Aug. 27, 1962, NASA launched Mariner 2<\/a>, the world’s first spacecraft to successfully visit another planet.<\/p>\n

Mariner 2 flew by Venus<\/a> after a 3.5-month voyage through space.<\/p>\n

<\/p>\n

The mission launched just one month after the Mariner 1 mission failed during launch<\/a>. After departing from Cape Canaveral, Florida, Mariner 2 almost met the same fate when an electrical problem with the Atlas-Agena rocket caused it to start rolling, which made it unable to respond to any guidance commands from mission control.<\/p>\n

By some miracle, the problem fixed itself, and Mariner 2 was on its way to Venus<\/a>!<\/p>\n

Why it mattered<\/p>\n

\n

\"Mariner\n<\/p>\n

Mariner 2 lifts off from Cape Canaveral, Florida atop an Atlas Agena B\u00a0rocket on Aug. 27, 1962 in this NASA video still. (Image credit: NASA)<\/p>\n

Mariner 2 was a watershed mission for NASA at a time when, in the early 1960s, the U.S. was trailing behind in the Space Race<\/a> with the Soviet Union \u2014 which had already launched the first satellite (Sputnik 1<\/a> in 1957), the first living creature (Laika<\/a> the dog on Sputnik 2 that same year), the first human in space (Yuri Gagarin<\/a> in 1961) and sent a probe to the moon (Luna 1 in 1959).<\/p>\n

You may like<\/p>\n

NASA’s big Venus first mission, Mariner 1, failed out of the gate as mentioned above during an attempted launch on July 22, 1962, but those fortunes changed with Mariner 2.<\/p>\n

It was an electrical short that caused Mariner 2’s rocket to roll during ascent, but the booster managed to correct itself after about a minute, NASA<\/a> has said.<\/p>\n

\"Space\"<\/p>\n

The trip to Venus was a bit rocky, too, with Mariner 2 suffering a solar panel power drop out two times, as well as glitchy attitude control gyroscopes. Mariner 2 also got surprisingly hot as it approached its Venus flyby, prompting worries it might be cooked before it even reached the planet.<\/p>\n

Despite all that, Mariner 2 achieved the first U.S. “first” in space, with a successful Venus flyby on Dec. 14, 1962. The probe flew within 21,564 miles (34,675 kilometers) of the hellish planet, taking the first close measurements of Venus at the time.<\/p>\n

\n

\"Mariner\n<\/p>\n

Mariner 2 mission scientists hold a printout of Venus data collected by the spacecraft. (Image credit: NASA\/JPL-Caltech)<\/p>\n

Mariner 2 carried no cameras (surprisingly), but its observations were the first detailed measurements of the Venus atmosphere<\/a> and Venus’ temperature<\/a>, proving to scientists that the planet experienced a runaway greenhouse effect<\/a> in the past. The probe’s radio signals were also used to calculate Venus’ mass in extreme detail, NASA has said.<\/p>\n

“There will be other missions to Venus, but there will never be another first mission to Venus,” said Jack James<\/a>, NASA’s Mariner 2 project manager at the Jet Propulsion Laboratory in Pasadena, California, before his death in 2001.<\/p>\n

Want more space history? Check out our full On This Day In Space Story archive<\/a> and watch our On This Day In Space videos on YouTube<\/a>.<\/p>\n

\"Sigmund<\/p>\n

\nOn this day in space! Aug. 26, 1978: Sigmund J\u00e4hn becomes 1st German in space<\/p>\n","protected":false},"excerpt":{"rendered":"On Aug. 27, 1962, NASA launched Mariner 2, the world’s first spacecraft to successfully visit another planet. Mariner…\n","protected":false},"author":2,"featured_media":606343,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[61,60,82,247],"class_list":["post-606342","post","type-post","status-publish","format-standard","has-post-thumbnail","category-space","tag-ie","tag-ireland","tag-science","tag-space"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/606342","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/comments?post=606342"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/606342\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media\/606343"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media?parent=606342"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/categories?post=606342"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/tags?post=606342"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}