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50 years since Apollo 13 miracle

“Houston, we have a problem.” 50 years ago, In April 1970 more than a billion people worldwide watched their televisions holding their breath in the wake of an explosion on the Apollo 13 spacecraft that was headed to the moon. Apollo 13 was the seventh manned mission in the Apollo space program and the third meant to land on the Moon. The craft was launched from Kennedy Space Center on April 11, 1970, but the lunar landing was aborted after an oxygen tank in the service module failed two days into the mission. The crew instead looped around the Moon, and returned safely to Earth on April 17. The mission was commanded by Jim Lovell with Jack Swigert as command module pilot and Fred Haise as lunar module  pilot. Swigert was a late replacement for Ken Mattingly, who was grounded after exposure to rubella.

A routine stir of an oxygen tank ignited damaged wire insulation inside it, causing an explosion that vented the contents of both of the SM’s oxygen tanks to space. Without oxygen, needed for breathing and for generating electric power, the SM’s propulsion and life support systems could not operate. The CM’s systems had to be shut down to conserve its remaining resources for re-entry, forcing the crew to transfer to the lunar module as a lifeboat. With the lunar landing canceled, mission controllers worked to bring the crew home alive.

The Apollo 13 service module showing the damage from the explosion
Nasa mission controllers were forced to improvise a number of solutions to get the Apollo 13 crew home safe

Although the LM was designed to support two men on the lunar surface for two days, Mission Control in Houston improvised new procedures so it could support three men for four days. The crew experienced great hardship caused by limited power, a chilly and wet cabin and a shortage of potable water. There was a critical need to adapt the CM’s cartridges for the carbon dioxide removal system to work in the LM; the crew and mission controllers were successful in improvising a solution. The astronauts’ peril briefly renewed interest in the Apollo program; tens of millions watched the splashdown in the South Pacific Ocean on television.

The Apollo 13 spacecraft pulled out of the Pacific Ocesn
The Apollo 13 crew received America’s highest civilian honor from President Nixon

The story of Apollo 13 has been dramatized several times, most notably in the 1995 film Apollo 13 – based on a memoir co-authored by Lovell titled Lost Moon – and an episode of the 1998 miniseries From the Earth to the Moon.

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