Update for 9:48 pm: NASA test-fired its first Space Launch System core booster Saturday, but the trial did not go as planned. Read our full story here. NASA will attempt to fire the engines on its ...

A critical test firing Saturday of the four main engines powering the first stage of NASA's gargantuan Space Launch System moon rocket is the final major hurdle before the fully assembled booster's ...

Engineers are getting ready to put the pressure on hardware for the world’s most powerful rocket, NASA’s Space Launch System, as part of a rigorous test series to ensure each structure can withstand ...

NASA's long-awaited Space Launch System (SLS) was tested in Mississippi this past weekend. The core stage of the rocket, which is the part that will provide the oomph to send missions into space, was ...