Proper noun
Space Launch System
(transport, space science) A Shuttle-derived heavy launch vehicle being designed by NASA to replace the Space Shuttle.
NASA has announced that on June 24, engineers completed the Space Launch System (SLS) rocket’s structural testing process for the Artemis lunar mission. Source: Internet
Engineers intend to conduct a critical test on the Space Launch System (SLS) core stage rocket that will help carry astronauts to the moon. Source: Internet