Diagram of the deployment of the #Skylab parasol.

What would've been a bad day on #Skylab - medical equipment for emergencies.

Skylab 2's Pete Conrad!

A busy Paul Weitz in the Workshop simulator. #Skylab

#Skylab 2 launched on this day, with the first crew to the still ailing space station. They had their work cut out for them.

Al Bean does some #Skylab reading in his Skylab bunk.

NASA's Galileo spacecraft to explore Jupiter, and a cross-section of the probe that plunged into Jupiter itself to provide brand new information about its atmospheric composition!

We remember space shuttle astronaut John Fabian on his passing. His missions included a bundle of new firsts into the space program, including the first American female astronaut crewmate Sally Ride, and the first mission with no pre-shuttle astronauts.

A contemporary cross-section of the Skylab main module, the Workshop. #Skylab lives at skylab.space/

Astronaut Pete Conrad suiting up. #Skylab away at skylab.space/

Skylab's loss of thermal protection required some quick thinking - and an umbrella! #Skylab lives at skylab.space/

Doctor Joe worked even while sleeping - he had to wear a cap that recorded his brain activity while he dozed. #Skylab away at skylab.space/

The prototype vs. the real deal! Al Bean tests the Astronaut Maneuvering Unit indoors at #Skylab, while Bruce McCandless (co-inventor of both!) tests the MMU in free flight.

Al Bean's Apollo 12 moon landing mission photo! NASA liked it so much that they cropped him out of it for his Skylab photo. #Skylab flies at skylab.space/

NASA's first class of women astronauts pose with the Personal Rescue Enclosure, a cloth bag that would have been used by rocket pack-wearing astronauts to transport their crewmates from a stricken space shuttle to a rescue vehicle. Skylab lives at skylab.space/

The NBS water tank, which served as the primary underwater training facility for Skylab and early space shuttle missions. Skylab lives at skylab.space/

Skylab's first crew was grounded #OTD to give NASA more time to assess the damage to the station and to find out ways how the crew could repair the station.

Testing Skylab's ATM solar wings. Really puts them into perspective! #Skylab lives in skylab.space/

A design fault caused severe damage to Skylab during the launch when the protective shield around the main body of the station tore off. This would cause the delay of the launch of the first crew to give everyone time to assess the situation.

Off she goes! Skylab launched #OTD in 1973!

Skylab ahead!

The Skylab 4 astros soon after splashdown on the deck of the recovery vessel.

What would become the Hubble main mirror. #Skylab lives at skylab.space/

Paul Weitz and Joe Kerwin experimenting with the qualities of space during the first #Skylab mission!

Happiest of birthdays to our beloved Vance Brand, the #Skylab backup, Skylab Rescue Commander, ASTP Pilot, and many-time space shuttle commander!

#Skylab came down to Earth in six years, but the NASA LAGEOS satellite is expected to last a few million years? #Skylab lives at skylab.space/

Skylab, you are on TV! And you too can see all of this #Skylab TV at skylab.space/

NASA-West German joint HELIOS solar observatory, under assembly. #Skylab lives at skylab.space/

Yohoo, Skylab! #Skylab lives at skylab.space/

That's no moon, that's - Well, that is a moon, but, you know. May the Fourth be with you! #StarWars

A contemporary of #Skylab, Mariner 10 was humanity's first look at the mysterious planet closest to the Sun! Skylab lives at skylab.space/

Skylab's Multiple Docking Adapter undergoing testing. Skylab flies at skylab.space/

Beautiful NASA artwork of the Pioneer Venus spacecraft that explored Venus in the 1970's and 1980's. We keep Skylabbing at skylab.space/

Who are you? Answer may be found at skylab.space/

#Skylab space station and Skylab 2 crew launch vehicle, ready to go! Search for Skylab at skylab.space/

How many #Skylab s does it take to change the world? Just one! skylab.space/

Space dreams - what could have followed #Skylab 1970's space fun continues at skylab.space/

Peek into #Skylab at skylab.space/

Jack Lousma of #Skylab fame! Famously Skylab webpage is found at skylab.space/

#Skylab backup Vance Brand, finally in space in 1975! Fly to Skylab with us at skylab.space/

Al Bean training for #Skylab in the high fidelity simulator. #Skylab lives at skylab.space/

Skylab body mass experiment was a zero-G scales! We #Skylab at skylab.space/