SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/aero-mir-first-modular-station

How did Mir differ from one-piece stations like Skylab?

Mir grew by adding modules after its core reached orbit.

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  1. It never housed crews
  2. It was assembled from modules ✔
  3. It orbited the Moon

Why: Mir began with a core module, then gained research modules over time. That made it the first truly modular space station, unlike Skylab, which launched as one large station.

Huh, didn't know that: Mir's first module launched in 1986.

The dad joke
Mir kept adding rooms because space guests needed elbow room.
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References

Answer: It was assembled from modules. Mir began with a core module, then gained research modules over time. That made it the first truly modular space station, unlike Skylab, which launched as one large station.

  1. NASA, Historical Origins of ISS www.nasa.gov/history/space-station-20th-historical-origins-of-iss
    Mir was the first truly modular space station
    Checked 2026-10-10.

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