How to watch NASA fire up its massive SLS moon rocket on Saturday - CNET

The latest SLS Green Run tests are taking place at NASA's Stennis Space Center in Mississippi.

NASA is nearing the end of the Green Run test series that puts the core stage -- which the agency describes as "the backbone of the SLS rocket" -- through its paces before it actually launches off this rock sometime in the future. .

"The upcoming hot fire test will fire all four of the stage's RS-25 engines simultaneously for up to eight minutes to simulate the core stage's performance during launch," NASA said in a statement on Jan.

The SLS Green Run test will take place at the Stennis Space Center in Mississippi, and it comes after NASA worked through an unexpected issue with a previous test, a wet dress rehearsal that "marked the first time cryogenic, or super cold, liquid propellant was fully loaded into, and drained from, the SLS core stage's two immense tanks."