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40 Years Ago: Skylab Reenters Earth’s Atmosphere (46 Yrs)
NASA History ^ | July 11 2019 | John Uri

Posted on 07/12/2025 2:42:07 AM PDT by texas booster

Skylab was America’s first space station and first crewed research laboratory in space. The complex consisted of four major components: the Orbital Workshop (OWS), the Airlock Module (AM), the Multiple Docking Adapter (MDA), and the Apollo Telescope Mount (ATM). The Apollo Command and Service Module transported crews to and from Skylab and remained attached to the station throughout a crew’s occupancy. The OWS, converted from the upper stage of a Saturn rocket, served as the main working, living and sleeping compartment for the crews, and contained exercise equipment, a galley, and many of the scientific experiments, in particular for the life sciences studies. The AM enabled astronauts to conduct spacewalks, while the MDA included a prime and backup docking port for the Apollo spacecraft and housed the Earth Resources Experiment Package. The ATM contained telescopes for solar observations and four solar arrays for additional power. Once in orbit, the complex weighed 170,000 pounds, by far the heaviest spacecraft to date. An unprecedented research laboratory in space, Skylab contained scientific equipment to conduct research in a variety of disciplines. Astronauts aboard the station conducted 270 experiments in biomedical and life sciences, Earth observations, solar astronomy and materials processing. Among the most important were investigations on the astronauts’ physiological responses to long-duration space flight.


TOPICS: Astronomy; Computers/Internet; History; Science
KEYWORDS: 1979; 46years; flashback; godsgravesglyphs; nasa; skylab
On May 14, 1973, the final Saturn V rocket thundered off Launch Pad 39A at Kennedy Space Center to lift the Skylab space station into orbit. About 63 seconds into the mission, telemetry indicated premature deployment of the micrometeoroid shield, designed to protect the station from debris and also act as a thermal blanket. Debris from the torn shield jammed one of the station’s large solar arrays and aerodynamic forces tore the other panel completely off. Skylab made it to orbit, but it was underpowered and rapidly overheating. Mission managers delayed the launch of the first crew by 10 days as engineers devised ways to save the station. Once on orbit, the Skylab-2 crew deployed a sunshade to cool the station and eventually free the stuck solar panel, saving the program.

In all, three successive three-person crews spent 28, 59 and 84 days, respectively, aboard the space station, and as a platform for conducting scientific research Skylab proved its value. The biomedical investigations carried out by the nine Skylab crewmembers provided our first glimpse into the effects of long-duration spaceflight on the human body and how to prevent some of the more deleterious effects. The ATM solar telescopes took more than 170,000 images for astronomers, while Earth scientists received 46,000 photographs. In nearly every science discipline, the astronauts exceeded the planned number of investigations. Of significant importance, having humans available for unplanned situations proved highly valuable, from the repair of the space station after its damage at launch, to being able to respond to unexpected events to increase the science return from the mission including observing new solar flares and a comet making a rare passage through the inner solar system. Managers, flight planners, and engineers used the Skylab experience to learn about how to live aboard and operate a long-duration crewed platform in space, passing on lessons learned to later programs like Shuttle-Mir and the International Space Station.

Before leaving the station on Feb. 8, 1974, the Skylab-4 crew boosted it into a higher 269-by-283-mile orbit, in the hope that Skylab would remain in space until 1983. By then, the Space Shuttle would be flying and NASA hoped that astronauts could attach a rocket to the station to either boost it to a higher orbit or safely deorbit it over the Pacific Ocean. But delays in the Shuttle program and higher than expected solar activity resulting in increased atmospheric drag on the station ultimately thwarted those plans. It became apparent that Skylab would reenter in mid-1979, forcing NASA to devise plans to control its entry point as much as possible by adjusting the station’s attitude to adjust atmospheric drag.

On July 11, 1979, during its 34,981st orbit around the Earth, engineers in Mission Control at the Johnson Space Center in Houston sent the final command to Skylab to turn off its control moment gyros, sending it into a slow tumble. This was the best that flight controllers could do to ensure that Skylab would not reenter over a populated area such as North America. They expected that it would begin its breakup over the southern tip of Africa and fall into the Indian Ocean. As it happened, the breakup occurred slightly later and while the majority of the debris that survived reentry did fall into the Indian Ocean, some pieces fell over sparsely populated areas of southern Western Australia. A museum in Esperance houses some of the recovered debris. Skylab Flight Director Charles S. Harlan said in a news conference after the event, “The surprise is over. No more suspense. Skylab is on the planet Earth.”

1 posted on 07/12/2025 2:42:07 AM PDT by texas booster
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To: texas booster
Right: Ground track of Skylab of its final orbits and the debris footprint in southwest Australia.

Aside: has anyone ever been to the last Skylab museum in Esperance, Australia?

2 posted on 07/12/2025 2:44:27 AM PDT by texas booster (Join FreeRepublic's Folding@Home team (Team # 36120) Cure Alzheimer's!)
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To: texas booster
Launch of the Skylab space station on May 14, 1973. It was the final launch of a Saturn V rocket.

And that, my friends, is a real, hand built rocket.

3 posted on 07/12/2025 2:46:46 AM PDT by texas booster (Join FreeRepublic's Folding@Home team (Team # 36120) Cure Alzheimer's!)
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To: texas booster
Skylab as it appeared to the final crew upon its departure.

I still think of THIS as a real space station.

You may continue feeding me my pudding.

4 posted on 07/12/2025 2:48:40 AM PDT by texas booster (Join FreeRepublic's Folding@Home team (Team # 36120) Cure Alzheimer's!)
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To: texas booster

I wasn’t into astronomy or sky-watching at the time, it would be interesting to know if anyone saw it travel across the sky, like we observe the ISS.


5 posted on 07/12/2025 4:50:02 AM PDT by telescope115 (I NEED MY SPACE!!! 🔭)
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To: telescope115

I’m thinking it must’ve been highly visible.


6 posted on 07/12/2025 4:50:46 AM PDT by telescope115 (I NEED MY SPACE!!! 🔭)
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To: texas booster

One of its descending orbits was right over Colorado. I remember seeing it at dusk, as a kid. Seemed so close as all of the panels glowed.


7 posted on 07/12/2025 5:00:52 AM PDT by LittleBillyInfidel (This tagline has been formatted to fit the screen. Some content has been edited.)
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To: texas booster

I remember when this happened, I was spending the week at summer camp. As a science nerd I was disappointed that I couldn’t watch the news coverage.


8 posted on 07/12/2025 5:09:11 AM PDT by CtBigPat (Epstein's client list did not kill itself.)
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To: telescope115

“I wasn’t into astronomy or sky-watching at the time, it would be interesting to know if anyone saw it travel across the sky, like we observe the ISS.”

My Dad took me out in the backyard and showed me Sputnik.


9 posted on 07/12/2025 5:34:13 AM PDT by dljordan (The Rewards of Tolerance are Treachery and Betrayal)
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To: telescope115

Yes, it was. I didn’t see the final dozen orbits, bit the day before is was one of the brightest objects in the sky.

You could see the movement in just a short time of watching, and it glowed reddish yellow.

Completely awe-inspiring.


10 posted on 07/12/2025 7:11:28 AM PDT by texas booster (Join FreeRepublic's Folding@Home team (Team # 36120) Cure Alzheimer's!)
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To: texas booster
In 1974 I was employed by Sperry Rand Space Support Services in Huntsville. I wrote a FORTRAN program to strip laboratory data from master down-link tapes, and raised the data recovery rate from 20% to 95%. That earned a nice letter from "on the Hill". I hung out with a cute chick whose brother was a senior mathematician in Von Braun's office. From time to time she would wrangle lock codes out of him, giving us opportunity to visit interesting places on our lunch break. One of those visits was with Skylab's sister ship, which was on standby but never flown. It was surprisingly spacious inside, but was divided into sections with a magnesium-aluminum alloy grating as flooring. Instrumentation was everywhere.

Sadly, I did not have a camera with me since that was forbidden over the entire MSFC.

All those guys who worked on the Saturn V and Skylab were enthusiastic and eager to share stories of Saturn's development. They were heartbroken when Von Braun left.

One rite of passage was being made to walk in close proximity to an un-shrouded, spun-up Skylab torquing gyro. That was terrifying.

11 posted on 07/12/2025 7:18:39 AM PDT by GingisK
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To: texas booster

I remember this fondly from growing up in Chicago:

https://www.youtube.com/watch?v=qLoNQNK376E#ddg-play


12 posted on 07/12/2025 7:36:32 AM PDT by KingLudd
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To: KingLudd
Oddly enough for Steve Skylab crashed on July 11th of 1979, one day before the infamous Disco Demolition, where of course the Disco fad crashed as well!

Thanks! NASA ... for telling us where it's NOT going to land!

13 posted on 07/12/2025 7:55:29 AM PDT by texas booster (Join FreeRepublic's Folding@Home team (Team # 36120) Cure Alzheimer's!)
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To: texas booster

Cool. Sorry I missed it…


14 posted on 07/12/2025 12:12:10 PM PDT by telescope115 (I NEED MY SPACE!!! 🔭)
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To: dljordan

Wow, now that’s a memory!


15 posted on 07/12/2025 12:13:07 PM PDT by telescope115 (I NEED MY SPACE!!! 🔭)
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To: dljordan

I was only 3 at the time, lol.


16 posted on 07/12/2025 12:13:45 PM PDT by telescope115 (I NEED MY SPACE!!! 🔭)
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To: telescope115

“Wow, now that’s a memory!”

I still remember it to this day and I miss my Dad.


17 posted on 07/12/2025 12:45:59 PM PDT by dljordan (The Rewards of Tolerance are Treachery and Betrayal)
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Just adding to the catalog, not pinging the list. I have a piece of the tank, somewhere.

18 posted on 07/13/2025 5:48:59 PM PDT by SunkenCiv (The moron troll Ted Holden believes that humans originated on Ganymede.)
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