Target Pillar: Key Milestones in the History of Space Exploration
Last Updated: August 21, 2026 Author: Sarah Mitchell
Introduction
Skylab, America’s first space station, very nearly failed before it was even occupied. Sixty-three seconds after its May 14, 1973 launch, a critical piece of hardware tore away in flight — a failure serious enough that NASA delayed sending the first crew for ten extra days just to figure out how to save the mission at all.[^1] What followed was one of NASA’s more impressive real-time engineering recoveries, leading to a station that ultimately hosted three separate crews, generated genuinely valuable science, and — six years after its final crew departed — made global headlines one more time by crashing back to Earth in pieces over Australia.[^2]
What Skylab Actually Was
Skylab launched on the last Saturn V rocket ever flown, built from a converted S-IVB third stage — the same upper-stage hardware that would otherwise have helped send an Apollo mission toward the Moon.[^1][^3] Once in orbit, the completed station stretched 118 feet long and weighed roughly 77 tons, built from four major components: the orbital workshop (the main living and working space), an airlock module, a multiple docking adapter, and the Apollo Telescope Mount, a dedicated solar observation instrument.[^4]
Its scientific ambitions were genuinely broad for the era. NASA planned three crews of three astronauts to spend 28, 56, and 56 days aboard the station respectively, conducting some 270 separate experiments spanning life sciences (particularly how the human body adapts to extended spaceflight), Earth science observation, solar physics and astronomy, and materials processing research.[^1] Notably, Skylab wasn’t the first space station in history — the Soviet Union had already launched the experimental Salyut station in 1971 — but Skylab was considerably larger and more scientifically complex than its Soviet predecessor.[^1]
The Near-Disaster at Launch
Almost immediately after liftoff, vibration during ascent caused Skylab’s micrometeoroid shield — a piece of hardware designed to both protect the station from small debris impacts and function as thermal insulation — to tear away prematurely, just 63 seconds into the flight.[^5] As NASA’s own account describes it, this ripped-away shield disturbed the mounting of one of the station’s two main solar array wings, causing it to partially deploy at exactly the wrong moment — after which the exhaust plume from the rocket’s second-stage retro-rockets struck the partially deployed panel directly and blew it entirely off the vehicle.[^5] Debris from the torn shield then wrapped around the station’s second solar panel, jamming it and preventing it from deploying at all.[^6]
The consequences compounded quickly. Without the missing shield’s protection, the interior of Skylab’s orbital workshop began heating to genuinely dangerous temperatures, threatening to degrade the interior insulation and adhesives — potentially rendering large parts of the station uninhabitable before a single astronaut ever set foot aboard it.[^7] With one solar array destroyed and the other jammed shut, the station was also generating a fraction of its planned electrical power.
The Fix: A Parasol and a Prybar
NASA’s response required delaying the first crewed mission by ten days specifically to train the incoming astronauts on emergency repair procedures that didn’t exist when the mission was originally planned.[^8] When Commander Charles “Pete” Conrad, pilot Paul Weitz, and science pilot Joseph Kerwin finally launched on May 25, 1973, their mission had effectively been redefined around saving the station before any of the planned science could begin.[^8]
The crew’s solution to the overheating problem was almost improvised in its simplicity: they deployed a specially designed parasol-style sunshade through a small scientific airlock, unfurling it over the exterior of the workshop to block direct sunlight and bring interior temperatures back down to survivable levels.[^7] Solving the jammed solar array required a hands-on spacewalk repair — astronauts physically freed the panel using tools including a specialized cutting device to remove the debris pinning it shut, ultimately restoring a meaningful portion of the station’s lost electrical power.[^6] It’s a rescue story with clear echoes of Apollo 13’s improvised fixes just three years earlier, though in Skylab’s case the crew was saving a space station rather than themselves.
Three Crews, Genuine Science, and a Longer Stay Than Planned
With the station stabilized, Skylab went on to host all three of its planned crews across 1973 and 1974, ultimately exceeding NASA’s pre-mission science expectations.[^2] The final crew’s mission stretched to 84 days — nearly three months — demonstrating conclusively that astronauts could live and work productively in space for extended durations, a foundational finding for every long-duration mission that followed, including the eventual International Space Station.[^9] Over the program’s full run, Skylab crews spent more than 700 hours directly observing the Sun and returned more than 175,000 solar photographs, alongside extensive Earth-observation data and the human physiology research the mission had originally prioritized.[^2]
An Unplanned Return: Skylab’s Reentry Over Australia
Skylab was never intended to remain in orbit indefinitely, but its eventual return to Earth didn’t go entirely to plan either. Roughly five years after the final crew departed, the station’s orbit began deteriorating faster than NASA had projected, driven by unexpectedly high solar activity increasing atmospheric drag at the station’s altitude.[^2] On July 11, 1979, the surviving sections of Skylab that didn’t burn up during reentry came down over Western Australia and the Indian Ocean.[^2] No one was injured, though the event became a genuine, if brief, global media spectacle — an unplanned coda to a mission that had already survived one near-disaster at the very start of its life.
Frequently Asked Questions
Was Skylab the first space station ever launched?
No — the Soviet Union’s Salyut, launched in 1971, holds that distinction. Skylab was the first American space station, and was substantially larger and more scientifically capable than Salyut, though it launched two years later.
How close did Skylab come to being a complete failure?
Genuinely close — the loss of one solar array and the jamming of the second during launch left the station without enough power and facing dangerous interior overheating before any crew arrived, and NASA’s engineers had to devise and train astronauts on entirely new repair procedures within just ten days to save the mission.
Did Skylab actually complete its planned science mission despite the launch damage?
Yes, and by NASA’s own account it exceeded pre-mission expectations, hosting all three planned crews (28, 59, and 84 days respectively) and generating substantial solar, Earth-observation, and human physiology research despite the rocky start.
Why did Skylab eventually crash back to Earth?
Its orbit decayed faster than NASA had projected, due to unexpectedly high solar activity increasing atmospheric drag on the station. Rather than a controlled, planned deorbit, this was a natural orbital decay that NASA tracked but couldn’t fully control by the time it occurred in 1979.
Was anyone hurt when Skylab fell to Earth?
No — the surviving debris landed in a sparsely populated area of Western Australia and in the Indian Ocean, and no injuries were reported, despite the considerable global public attention the reentry generated at the time.
Sources
- NASA — 50 Years Ago: The Launch of Skylab, America’s First Space Station
- HISTORY — America’s First Space Station, Skylab, Is Launched
- NASA — 50 Years Ago: Six Months Until Skylab, America’s First Space Station
- Smithsonian National Air and Space Museum — Skylab
- Space.com — Skylab: First U.S. Space Station
- Fox News — This Day in History: Skylab, First U.S. Space Station, Launched
- NASA — This Week in NASA History: First Crewed Skylab Mission Launches
- Fox News — This Day in History: Skylab (crew training delay)
- Britannica — Skylab
Note on methodology: historical details above are drawn primarily from NASA’s official history pages, published to mark Skylab’s 50th anniversary, along with Smithsonian and Britannica reference sources. This is a well-documented historical event with consistent figures across NASA’s own primary-source archives as of mid-2026.