page_title: Spacelab
section_title: List of parts
hierarchical_section_title: Spacelab / Components / List of parts
caption_attribution_description: English: The ASTRO-1 payload is loaded in the cargo bay of the Space Shuttle Columbia while the orbiter undergoes processing for mission STS-35.
context_page_description: Spacelab was a reusable laboratory developed by ESA and used on certain spaceflights flown by the Space Shuttle. The laboratory comprised multiple components, including a pressurized module, an unpressurized carrier and other related hardware housed in the Shuttle's cargo bay. The components were arranged in various configurations to meet the needs of each spaceflight.
  Spacelab components flew on a total of about 32 Shuttle missions, depending on how such hardware and missions are tabulated. Spacelab allowed scientists to perform experiments in microgravity in Earth orbit. There was a variety of Spacelab-associated hardware, so a distinction can be made between the major Spacelab program missions with European scientists running missions in the Spacelab habitable module, missions running other Spacelab hardware experiments, and other STS missions that used some component of Spacelab hardware. There is some variation in counts of Spacelab missions, in part because there were different types of Spacelab missions with a large range in the amount of Spacelab hardware flown and the nature of each mission.
context_section_description: Examples of Spacelab components or hardware:
  EVA Airlock
  Tunnel
  Tunnel adapter
  Igloo
  Spacelab module
  Forward end cone
  Aft end cone
  Core segment/module
  Experiment racks
  Experiment segment/module
  Electrical Ground Support Equipment
  Mechanical Ground Support Equipment
  Electrical Power Distribution Subsystem
  Command and Data Management Subsystem
  Environmental Control Subsystem
  Instrument Pointing System
  Pallet Structure
  Multi-Purpose Experiment Support Structure (MPESS)
  The Extended Duration Orbiter (EDO) assembly was not Spacelab hardware, strictly speaking.  However, it was used most often on Spacelab flights. Also, NASA later used it with the SpaceHab modules.
caption: ASTRO-1 payload prepared, 1990
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