NASA is all but certain it wont fly to the moon in March for good reason

NASA is already walking back its Friday announcement that it will try to launch to the moon in March, after discovering a new problem with the Artemis II rocket. 

Officials said they're eyeing Tuesday, Feb. 24, to haul the rocket off the launchpad.

During a routine step to restore pressure in the Space Launch System, the team couldn't get helium to flow properly through the rocket. Helium, though not a fuel, is important because it helps protect the engines and keeps the fuel tanks at the right pressure.