La NASA confirme la découverte de l’artefact de la navette spatiale Challenger

La mission STS-51L retire la tour du Launch Complex 39B au Kennedy Space Center de la NASA en Floride le 28 janvier 1986. Crédit : NASA

Le 28 janvier 1986, le service de Challenger dans le programme spatial américain s’est terminé en tragédie lorsqu’une panne de rappel a provoqué une explosion qui a entraîné la perte de sept astronautes, ainsi que du véhicule, à peine 73 secondes après le début de la mission STS 51-L.

récemment,[{” attribute=””>NASA leaders viewed footage of an underwater dive off the East coast of Florida, and they confirm it depicts an artifact from the space shuttle Challenger.

A TV documentary crew seeking the wreckage of a World War II-era aircraft discovered the artifact. Their divers noticed a large humanmade object covered partially by sand on the seafloor. The proximity to the Florida Space Coast, along with the item’s modern construction and presence of 8-inch square tiles, led the documentary team to contact NASA. (Although many of the space shuttle’s thermal protection tiles are black-coated High-Temperature Reusable Surface Insulation tiles which are 6 inches square, the white-coated Low-Temperature Reusable Surface Insulation tiles measure 8 inches long on each side.)

“While it has been nearly 37 years since seven daring and brave explorers lost their lives aboard Challenger, this tragedy will forever be seared in the collective memory of our country. For millions around the globe, myself included, January 28, 1986, still feels like yesterday,” said NASA Administrator Bill Nelson. “This discovery gives us an opportunity to pause once again, to uplift the legacies of the seven pioneers we lost, and to reflect on how this tragedy changed us. At NASA, the core value of safety is – and must forever remain – our top priority, especially as our missions explore more of the cosmos than ever before.”

NASA STS-51L Crew Members

NASA’s STS-51L crew members pose for photographs on January 9, 1986, during a break in countdown training at the White Room, Launch Complex 39, Pad B. Credit: NASA

The last Challenger mission, dubbed STS-51L, was commanded by Francis R. “Dick” Scobee and piloted by Michael J. Smith. The other crew members on board were mission specialists Ronald E. McNair; Ellison S. Onizuka, and Judith A. Resnik; payload specialist Gregory B. Jarvis; and teacher S. Christa McAuliffe.

A major malfunction 73 seconds after liftoff resulted in the loss of Challenger and the seven astronauts aboard. An agency investigation later showed unexpectedly cold temperatures affected the integrity of O-ring seals in the solid rocket booster segment joints.

The launch was scheduled as the agency’s 25th shuttle mission. While the spacecraft waited overnight on Launch Pad 39B at NASA’s Kennedy Space Center in Florida, a cold front brought freezing temperatures, causing ice to form on the shuttle. Despite concerns raised by some shuttle program employees, managers cleared the mission for launch, with liftoff occurring at 11:38 a.m. Eastern time.

The loss of Challenger, and later Columbia with its seven astronauts – which broke up on reentry in February 2003 over the western United States – greatly influenced NASA’s culture regarding safety. NASA created an Office of Safety and Mission Assurance, developed new risk assessment procedures, and established an environment in which everyone can raise safety concerns. The agency also created the Apollo Challenger Columbia Lessons Learned Program to share these lessons within the agency and with other government, public, commercial, and international audiences.

“Challenger and her crew live on in the hearts and memories of both NASA and the nation,” said Kennedy Space Center Director Janet Petro. “Today, as we turn our sights again toward the Moon and [email protected] pour organiser le retour des articles.

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