As of February 3, 2026, the Space Launch System (SLS) rocket stands tall on Launch Pad 39B, fully loaded with super-cold liquid hydrogen and oxygen. After a brief troubleshooting session regarding a minor hydrogen leak—a common hurdle for the massive rocket—NASA engineers have officially moved the countdown into the “replenish” phase.
This “Wet Dress Rehearsal” is the final major hurdle before the actual launch, currently targeted for February 9, 2026. This mission will carry four astronauts around the Moon, marking the first time humans have left Earth’s orbit since the Apollo era over 50 years ago.
Key Updates for Today:
- Full Fueling Achieved: Both the core stage and the upper stage (ICPS) are now in “replenish mode,” keeping the tanks topped off against natural boil-off.
- Closeout Crew Deployed: The specialist team has been sent to the pad to simulate hatch closure and final spacecraft sealing.
- Next Steps: Once the rehearsal ends today, NASA will analyze the data to give the final “Go” for the launch on February 9th.
For tech and space enthusiasts, this isn’t just a flight; it’s the ultimate stress test for the hardware that will eventually put boots back on the lunar surface.