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Space Launch System Block 1

Space Launch System Block 1 is the initial operational configuration of NASA’s expendable super heavy-lift launch vehicle. It combines a four-engine core stage, two five-segment solid rocket boosters, and a single-engine Interim Cryogenic Propulsion Stage to send Orion and more than 27 metric tons toward the Moon. Block 1 flew Artemis I and is used for Artemis II and Artemis III.

Space Launch System Block 1
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Identity

Aliases
SLS Block 1
Family Name
Space Launch System
Full Name
Space Launch System Block 1
Status
active
Type
rocket
Variant Name
Block 1

Details

Description
Space Launch System Block 1 is the initial operational configuration of NASA’s expendable super heavy-lift launch vehicle. It combines a four-engine core stage, two five-segment solid rocket boosters, and a single-engine Interim Cryogenic Propulsion Stage to send Orion and more than 27 metric tons toward the Moon. Block 1 flew Artemis I and is used for Artemis II and Artemis III.
Dimensions
Diameter M
8.4
Height M
98.3
First Flight Year
2,022
Manufacturer
Operator
Parent Vehicle Family
Propulsion Configurations
  • Entries
    • Nested value
    • Nested value
    • Nested value
  • Entries
    • Nested value
    • Nested value
    • Nested value
    Name
    SLS Block 1 RL10C-2 Artemis II/III configuration
    Notes
    NASA identifies the RL10C-2 derivative on the ICPS for Artemis II and Artemis III; the existing RL10B-2 Artemis I configuration remains preserved above.
Rocket Specs
Liftoff Mass Kg
2,608,156
Reusability
expendable
Stages Count
2
Strap On Boosters Count
2

Links

Assets & Meta

Creation Time
July 13, 2026 at 06:41:26 UTC
Updated Time
August 13, 2026 at 20:54:20 UTC

Other

Search Name
Space Launch System Block 1 SLS Block 1