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Faulty RS-25 Engine Removed From Artemis II SLS to Be Installed on Artemis IV Mega Rocket

American space agency NASA said it fixed one of the RS-25 engines that was supposed to be part of the Artemis II mission, will now fly on Artemis IV.
SpaceNews

SLS/Orion rolls to pad for Artemis 2

NASA’s SLS and Orion rolled to the launch pad for the Artemis 2 mission Jan. 17, though uncertainty remains about when the mission will be ready to launch.

Could cold temps delay Artemis launch date? NASA eyes Florida weather

NASA is keeping an eye on uncharacteristically cold weather in Florida that could thwart a potential launch of the upcoming Artemis 2 lunar mission.
Interesting Engineering on MSN

What Artemis II will validate before NASA attempts a crewed lunar landing

If all goes to plan, NASA will launch its Artemis II mission in February