.

Module

Command and service module

Docking adapter

Solar observatory

Airlock

Workshop

.

Manufacturer

Rockwell International

Martin Marietta

MSFC

MDAC-Eastern

MDAC-Western

.

Module name (development)

Command and service module

Multiple docking adapter

Apollo Telescope Mount

Airlock module/ fixed airlock shroud

Orbital workshop

.

Function

Crew ascent and descent

Docking interface

Solar observation

Power control and distribution

Primary living and working area

Controls and displays

Power source

Environmental control

Laboratory

Earth observation

Attitude control

Data center

Power source

Stowage

Extravehicular activity hatch

Stowage

Caution and warning

.

Length

10.45 m (34.3 ft)

5.27 m (17.3 ft)

4.05 m (13.3 ft)

5.36 m (17.6 ft)

14.66 m (48.1 ft)

Diameter

3.96 m (13.0 ft)

3.04 m (10.0 ft)

3.35 m (11.0 ft)

3.04/1.67/6.70 m (10.0/5.5/22.0 ft)

6.70 m (22.0 ft)

Habitable working volume

5.95 m³ (210 ft³)

32.28 m³ (1140 ft³)

-

17.66 m³ (624 ft³)

295.23 m³ (10 426 ft³)