STENNIS SPACE CENTER, Miss. - NASA conducted its sixth RS-25 single-engine hot fire Thursday on the A-1 Test Stand at Stennis Space Center in South Mississippi. It was a continuation of its seven-part test series to support development and production of engines for the agency’s Space Launch System (SLS) rocket on future missions to the Moon. Operators fired the engine for more than eight minutes (500 seconds), the same amount of time RS-25 engines need to fire for launch of the SLS rocket. (Source: NASA/SSC, 08/05/21) Previous