Space History Photo: Three-Radial-Module Space Station Concept
A three-radial-module space station concept.
Credit: NASA.

In this historic photo from the U.S. space agency, the three-radial-module space station concept from 1960 was intended to utilize Apollo hardware to deploy the station and to transfer crews to and from orbit.

Far Out Space Station Concepts by NASA: Gallery

Each weekday, SPACE.com looks back at the history of spaceflight through photos (archive).