Artist's concept of SkyLab space station cluster in Earth's orbit

S71-52192 (1971) --- An artist's concept of the SkyLab space station cluster in Earth's orbit. The cutaway view shows astronaut activity in the Orbital Workshop (OWS). The SkyLab cluster is composed of the OWS, Airlock Module (AM), Multiple Docking Adapter (MDA), Apollo Telescope Mount (ATM), and the Command and Service Module (CSM). Photo credit: NASA