The Nuclear Blast That Launched a Manhole Cover Into Space
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The Nuclear Blast That Launched a Manhole Cover Into Space
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Operation Plumbbob’s “Manhole Test” (officially known as Pascal-B) was a U.S. nuclear test conducted in 1957 at the Nevada Test Site. It involved detonating a small nuclear device in a deep underground shaft capped with a steel manhole cover. The goal was to study high-energy explosive effects and containment methods. The test unintentionally launched the steel cap at an extraordinary speed, possibly exceeding Earth’s escape velocity (~11.2 km/s), making it one of the fastest manmade objects. Wh
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Operation Plumbbob’s “Manhole Test” (officially known as Pascal-…
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FacebookSpace Knowledge
In 1957, during a secret nuclear experiment, scientists accidentally launched something far stranger than a rocket into the sky. A simple steel manhole cover was blasted upward by a powerful underground nuclear explosion, reaching an estimated speed of 200,000 km/h. Some scientists believe it may have escaped Earth’s atmosphere, making it the first human-made object to reach space—months before Sputnik was launched. Was this ordinary object vaporized by friction… or did it really disappear into
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The Factonaut on Instagram: "Operation Plumbbob's "Manhole Test" (officially known as Pascal-B) was a U.S. nuclear test conducted in 1957 at the Nevada Test Site. It involved detonating a small nuclear device in a deep underground shaft capped with a steel manhole cover. The goal was to study high-energy explosive effects and containment methods. The test unintentionally launched the steel cap at an extraordinary speed, possibly exceeding Earth's escape velocity (~11.2 km/s), making it one of th
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