Incredible shot of an on-stand camera on the A-1 Test Stand at Stennis Space Center providing a view of the power generated by an RS-25 engine. The core stage for initial Space Launch System missions will be powered by four of these former shuttle main engines. Credit: NASA #SLSFiredUp #engine #testing #engineering #technology #spaceflight #exploration #NASA #Stennis #SpaceLaunchSystem #JourneyToMars