Skylab 1 hi-res stock photography and images - Alamy
Con Stoitsis on Twitter: "On this day in 1973 Comet Kohoutek-Skylab became the first comet photographed from space. NASA picture. https://t.co/B7matE7tOT" / Twitter
File:Skylab astronauts talk to comet discoverer Kohoutek.jpg - Wikimedia Commons
File:Skylab brightness observations of Comet Kohoutek.png - Wikipedia
Skylab - Wikiwand
Skylab 1 hi-res stock photography and images - Alamy
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Skylab: The flown and unflown missions - RocketSTEM
Christmas 1973 on Skylab | Drew Ex Machina
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Our SpaceFlight Heritage: Skylab-4 rises and closes out U.S.' first space station - SpaceFlight Insider
US Space Cover Skylab 3 Photos Kohoutek KSC Kennedy Space Center FL 2/4/1974 | eBay