NASA’s RS-25 rocket engine firing during a ground test at Stennis Space Center. As the engine roars to life, sunlight passes through water vapor and steam used to cool the test stand—creating a natural rainbow around the exhaust plume. The RS-25 is the powerhouse engine that once flew on the Space Shuttle and now powers NASA’s Space Launch System (SLS) for future Artemis missions to the Moon and beyond. Science, power, and beauty—all in one frame. 🌍✨ Video credit: NASA #NASA #RS25 #RocketEngine