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Space Launch System

NASA Space Launch System is an evolvable heavy-lift rocket family for crewed and cargo deep-space missions. NASA states every SLS configuration uses a core stage with four RS-25 liquid-propellant engines.

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Identity

Aliases
SLS
Family Name
Space Launch System
Full Name
Space Launch System
Status
active
Type
rocket

Details

Description
NASA Space Launch System is an evolvable heavy-lift rocket family for crewed and cargo deep-space missions. NASA states every SLS configuration uses a core stage with four RS-25 liquid-propellant engines.
Propulsion Configurations
  • Entries
    • Count
      4
      Placement
      core
      Propulsion System
      Role
      main
      Stage
      core stage
      Variant Notes
      Applies to SLS Block 1, Block 1B, and Block 2 configurations described by NASA.
    Name
    Core stage
    Notes
    NASA states every SLS configuration uses four RS-25 engines in the core stage.
  • Entries
    • Count
      1
      Placement
      upper
      Propulsion System
      Role
      upper-stage
      Stage
      ICPS
      Variant Notes
      SLS integrated spacecraft/payload element; NASA identifies the ICPS as the upper-stage element for the first three Artemis missions.
    Name
    Interim Cryogenic Propulsion Stage
    Notes
    NASA states the ICPS uses one RL10 engine powered by liquid hydrogen and liquid oxygen.

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Creation Time
August 13, 2026 at 20:13:23 UTC
Updated Time
August 13, 2026 at 20:14:56 UTC