Cancelled Modules

Over the years NASA has cancelled a range of almost fully built ISS Modules,

The most significant ones being the ISS Habitation Module and the Centrifuge Accommodations Module(CAM)

And more recently the Bigelow Habitation Module .

Centrifuge Accommodations Module(CAM)

This module was built by the Japan's NASDA and then bought by NASA who finally cancel it in 2005.

The centrifuge would have provided controlled acceleration rates (artificial gravity) for experiments with artificial gravity levels between 0.01g and 2g.

The flight module and the centrifuge had been built