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Skylab

Skylab was NASA's first space station, built from Apollo hardware and launched on the last Saturn V on 14 May 1973. It lost its meteoroid shield and a solar array during the climb, was repaired in orbit by its first crew, hosted three crews for 171 days in all, and fell to Earth over Western Australia on 11 July 1979.

What happened

  1. 14 May 1973, T+63 seconds

    The shield tears away

    Skylab lifted off on the final Saturn V. About a minute in, telemetry showed trouble. According to the video, the meteoroid shield was ripped off at maximum dynamic pressure, one solar wing deployed early and was torn off, and a small strap from the shield pinned the other wing shut. Temperatures inside climbed to between 170 and 190 degrees Fahrenheit.

    Watch this moment · 14:50
  2. 14 to 24 May 1973

    Ten days to design a fix

    The first crew's launch, planned for the next day, was delayed ten days. Engineers across NASA and its contractors designed a sunshade, the parasol, to push through a small science airlock, plus long-handled cutters for the jammed wing. Crews rehearsed the work in the neutral buoyancy tank at Marshall.

    Watch this moment · 18:34
  3. 25 May 1973

    The first crew reaches a wounded station

    Pete Conrad, Joseph Kerwin and Paul Weitz launched and found Skylab with its shield area bare and one wing gone, the other partly deployed. They docked, found the air breathable but the interior dark and hot, and deployed the parasol through the airlock. Temperatures began to fall after about two revolutions.

    Watch this moment · 21:11
  4. First crew's stay

    Cutting the strap

    Conrad and Kerwin went out on a spacewalk with a 25-foot pole and cutters to free the jammed solar wing. There were no handrails or foot restraints where they worked. Conrad reported the strap cut, the wing opened and mission control saw current from the array. Video 297 counts two unplanned spacewalks on this crew's repairs.

    Watch this moment · 18:12
  5. 28 July 1973

    Skylab 3, the "Super Crew"

    The second crew arrived at a working station and stayed 59 days, doubling the record. NASA's page puts the flight at 59.5 days and 858 orbits. The video reports they completed about 150 per cent of their objectives, including pioneering medical work and photographs of solar flares.

    Watch this moment · 29:04
  6. 16 November 1973

    Skylab 4 falls behind

    Gerald Carr, Edward Gibson and William Pogue, all first-time flyers, began a mission that ran to 8 February 1974. The video reports that Pogue was ill early on, that the crew chose not to tell the ground, and that the recording was downloaded and heard anyway. A heavy workload followed.

    Watch this moment · 32:12
  7. Skylab 4, mid-mission

    Missed radio check, open talks

    On one day all three crew thought another was on the radio and no one answered the ground's call. Mission control and crew then held an open conversation about the pace of work, and the workload was eased. The crew went on to the 84-day record. Video 296 covers the episode under the label of an alleged mutiny.

    Watch this moment · 35:54
  8. 1978 to 1979

    The orbit decays

    After the last crew left in February 1974, Skylab was left dormant. Video 303 says a period of intense solar activity warmed and expanded the upper atmosphere, increasing drag, and that the Space Shuttle was not ready to boost it higher.

    Watch this moment · 11:39
  9. 11 July 1979

    The last command and the fall

    Ground control sent a last command to tumble the station, trying to bring it down in the ocean. Washington confirmed it had fallen into the Indian Ocean off the southwest of Australia, but debris came down over Western Australia, with no injuries reported.

    Watch this moment · 7:20
  10. July 1979

    Pieces found near Esperance

    Three men found a large piece of wreckage near Esperance, which the video reports was thought to be a pressurised sphere. Locals gathered debris; a San Francisco newspaper offered a 10,000 dollar prize for the first piece delivered, and the Shire of Esperance issued NASA a symbolic littering fine.

    Watch this moment · 26:06

Key facts

VehicleApollo spacecraft, Saturn V
Mission nameSkylab
Launch siteKennedy Space Center
Crew size0
Duration171 days occupied by three crews
OutcomeSuccess

A house made from a rocket stage

Werner von Braun had published station designs in the early 1950s. Skylab grew out of NASA's Apollo Applications Program, where leftover Apollo hardware was to be put to new use. The Apollo command and service module became the taxi. A Saturn V third stage became the workshop, first as a "wet workshop" fitted out in orbit and then as a "dry workshop" fitted out on the ground. Videos 293 and 301 also place Skylab against the Soviet Salyut station that flew first in 1971, whose crew died on the return to Earth.

Three crews, 171 days

The shield was a thin skin that was to protect the workshop from meteoroids and sunlight. Without it, the interior baked. The first crew's repairs allowed the 28-day Skylab 2 mission and set the pattern for later spacewalk repairs. Skylab 3 lasted 59 days and Skylab 4 lasted 84. The three missions added up to 171 days, according to video 297, with ten spacewalks and about 2,000 hours of experiments.

Video 299 describes the science: medical work on long weightlessness, solar observation, the comet Kohoutek and the Earth Resources Experiments Package. Video 302 adds a detail about the rescue. Engineers found tools through a Missouri maker, A. B. Chance, and flew them to Huntsville.

What the next flight changed

Skylab proved that people could live and work in orbit for months and that unplanned repairs in space were possible. The videos tie the spacewalk repair to later station and shuttle work. The fall in 1979 left a question that Skylab's operators had already considered, and per video 303 a NASA team leader said a fuel load for a controlled re-entry had been dropped at launch because of the danger to astronauts. NASA's next station programme was the International Space Station.

Questions and answers

  1. When was Skylab launched and when did it fall?

    Skylab was launched on 14 May 1973 and re-entered the atmosphere on 11 July 1979, according to NASA.

  2. What went wrong at launch?

    About a minute into the flight the meteoroid shield tore away, taking one solar array with it and pinning the other. The workshop overheated and lacked power.

  3. Who fixed it?

    The first crew, Pete Conrad, Joseph Kerwin and Paul Weitz, deployed a parasol sunshade and freed the jammed solar wing.

  4. How long did the crews stay?

    Skylab 2 stayed 28 days, Skylab 3 stayed about 59 days and Skylab 4 stayed 84 days. Together that is 171 days.

  5. Where did Skylab come down?

    NASA said it fell into the Indian Ocean off the southwest of Australia, with debris found across Western Australia near Esperance. No injuries were reported.

  6. Was there a mutiny on Skylab 4?

    One video uses that label. The accounts in the other videos describe a missed radio check, a tight schedule and an open conversation with mission control.

Sources: The facts and written text on this page come from the 8 videos on this page, by The History Guy: History Deserves to Be Remembered, Retro Space HD, Hubbell Power Systems, ABC News In-depth, Megaprojects, Classic Aerospace History, Progress – Science Documentaries, Absolute Documentaries.