The Space Launch System rocket being built by NASA is made up of two boosters and a large core stage 

The engines will produce 8.8 million pounds of thrust when they launch and 1.6 million lbs during this test

The $18.6 billion rocket will be able to take astronauts as well as cargo in a single trip to the moon in future

The first launch of SLS is scheduled for November 2021 assuming the hot fire testing goes according to plan