1M views · 10K reactions | NASA Rolls SLS to Launch Complex 39B for Artemis II Moon Launch | NASASpaceflight.com | Facebook

Watch NASA's massive Space Launch System (SLS) rocket and Orion spacecraft roll out to Launch Pad 39B on January 17th, 2026, in this detailed update ahead of the historic Artemis II mission — the first crewed flight to the Moon since Apollo 17 in 1972. To watch the full video on our BREAKINGspace channel, check out the link in the comments below! 👇 | NASASpaceflight.com

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