active New Space · USA

SLS Block 1

NASA/Boeing · operator profile

NASA's deep space launch vehicle for the Artemis programme. Non-reusable. Launched Artemis I (2022) and Artemis II crew (April 2026).

Specifications

Height
98.1 m
Diameter
8.4 m
Payload to LEO
95 t
Payload to GTO
27 t
Thrust at liftoff
39,144 kN
Stages
2
Reusable
No
First flight
2022
Propellant
LH2/LOX + APCP SRBs

Frequently asked about SLS Block 1

When did SLS Block 1 first fly?
SLS Block 1 had its first flight in 2022, operated by NASA/Boeing. Current status: active.
What's the payload capacity of SLS Block 1?
SLS Block 1 can lift up to 95 tonnes to Low Earth Orbit (LEO) and 27 tonnes to Geostationary Transfer Orbit (GTO).
How tall is SLS Block 1?
SLS Block 1 stands 98.1 metres tall with a diameter of 8.4 metres. Total thrust at liftoff: 39,144 kN across 2 stages.
Is SLS Block 1 reusable?
No, SLS Block 1 is expendable — boosters and upper stages are not recovered for reflight.