On this website you can find pictures of Skylab missions 2,3, and 4.

Here is an article explaining how the Skylab idea and program came about.

Here is an article explaining how the Skylab idea and program came about.

This structure was built in 1955 to provide a simulated zero-gravity environment in which engineers, designers, and astronauts could perform the various phases of research needed to gain firsthand knowledge concerning design and...