Qualla: Space Shuttle Challenger Disaster

Space Shuttle Challenger Disaster: Introduction

Tue, 10 Feb 2026 00:00:00 GMT

Photo credit NASA, Public domain. The night before the launch, engineers begged not to fly. On January 27, 1986, a three-way conference call connected Morton Thiokol in Utah, the Marshall Space Flight Center in Alabama, and Kennedy Space Center in Florida. The topic was rubber O-rings and freezing weather. Thiokol engineers Roger Boisjoly and Allan McDonald argued that the record-low temperatures forecast for the next morning would stiffen the O-ring seals in the solid rocket boosters, potentially allowing hot gas to burn through. NASA manager Lawrence Mulloy pushed back, demanding to know if they expected him to wait until April. Under pressure, Thiokol management reversed their engineers' recommendation. The next morning, at 11:38 a.m. on January 28, 1986, Space Shuttle Challenger launched from Kennedy Space Center. Seventy-three seconds later, it broke apart above the Atlantic Ocean, killing all seven people aboard.

Image: NASA | Public domain

Space Shuttle Challenger Disaster: Seven Who Flew

Tue, 10 Feb 2026 00:00:00 GMT

Photo credit CC0. Commander Dick Scobee and pilot Michael Smith sat in the flight deck. Mission specialists Ellison Onizuka, Judith Resnik, and Ronald McNair occupied the mid-deck alongside payload specialists Gregory Jarvis and Christa McAuliffe. McAuliffe was a high school teacher from Concord, ...

Image: CC0

Space Shuttle Challenger Disaster: Seventy-Three Seconds

Tue, 10 Feb 2026 00:00:00 GMT

Photo credit NASA, Public domain. Within the first three seconds after liftoff, cameras captured nine puffs of dark gray smoke escaping from the right solid rocket booster near its aft attachment strut. The cold had prevented the O-rings from sealing, and hot gas was already burning through. Molten aluminum oxide...

Image: NASA | Public domain

Space Shuttle Challenger Disaster: A Decade of Warnings

Tue, 10 Feb 2026 00:00:00 GMT

Photo credit NASA, Public domain. The O-ring problem was not new. A 1977 test had shown dangerous joint rotation under simulated launch pressure. The first in-flight O-ring erosion occurred in November 1981. By December 1982, the secondary O-ring was reclassified from a backup to a non-redundant component, meanin...

Image: NASA | Public domain

Space Shuttle Challenger Disaster: Feynman's Glass of Ice Water

Tue, 10 Feb 2026 00:00:00 GMT

Photo credit NASA, Public domain. President Ronald Reagan formed the Rogers Commission to investigate, assembling a panel that included Neil Armstrong, Sally Ride, and Chuck Yeager. Over four months, the commission interviewed more than 160 individuals and involved over 6,000 NASA personnel. During a televised he...

Image: NASA | Public domain

Space Shuttle Challenger Disaster: After the Silence

Tue, 10 Feb 2026 00:00:00 GMT

Photo credit Photography by James Humphreys - SalopianJamesPostprocessing by Liberal Freemason (talk), CC BY-SA 3.0. The Space Shuttle fleet was grounded for 32 months. NASA created a new Office of Safety, Reliability, and Quality Assurance. The solid rocket boosters were redesigned with a capture feature that reduced joint rotation to 15 percent of pre-disaster levels, plus heaters to maintain...

Image: Photography by James Humphreys - SalopianJamesPostprocessing by Liberal Freemason (talk) | CC BY-SA 3.0