This booster is part of the Space Launch system (SLS) mega rocket, which will be the most powerful system ever flown when it makes its first test flight expected in about two years.*
The rocket roared to life for its 2-minute test*in Promontory, Utah, at 11:05 a.m. ET, and it seemed pretty impressive for people witnessing it live.
Tuesday's firing marks the second time the booster has been tested, and these*qualifying trials are important because engineers need to understand how the rocket will function during flight. Read more...