RS-25 engines powering NASA's SLS (Space Launch System) rocket use liquid oxygen and liquid hydrogen as propellants – the same elements that combine to create water (H2O). For an RS-25 engine test, liquid hydrogen and liquid oxygen are mixed in the engine combustion chamber and ignited, which results in extremely high-temperature exhaust (up to 6,000 degrees F) exiting the nozzle into the flame deflector at a very high rate and pressure. Hundreds of thousands of gallons of water also are flowing

#ICYMI: Buildup of NASA’s SLS (Space Launch System) rocket for the Artemis III lunar mission has started at NASA's Kennedy Space Center. The Artemis III SLS engine section and boat-tail have been integrated and lifted into High Bay 2 in the Vehicle Assembly Building, just a few feet from where the Artemis II SLS is mostly stacked and undergoing integrated testing and checkouts. READ MORE >> https://go.nasa.gov/462zmie | NASA's Marshall Space Flight Center

6.6K views · 135 reactions | WATCH LIVE: NASA'S Space Launch System is rolled out to Launch Pad 39B at Kennedy Space Center ahead of the Artemis 1 moon mission. | CGTNEurope | Facebook