Variable Gravity Research Station Newton

In 1989 Sheila G. Bailey, Francis P. Chiaramontet, and Kenneth J. Davidian at the NASA Glenn Research Center proposed the Variable Gravity Research Facility "Newton." This space station would consist of a long truss with two spent Energia boosters at one end and a set of crew modules at the other. The module section would use its RCS system to spin up the station for simulating lunar or Martian gravity, with the Energia boosters acting as a counterweight. Once spun up, Newton would provide a platform for testing astronauts and equipment for future manned Mars and moon missions.