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.

A fully stacked SLS rocket is inside high bay 3 of Kennedy Space Center's Vehicle Assembly Building, where it is being prepared to roll out to LC-39B next week. Credit: Joel Kowsky/NASA CAPE CANAVERAL—NASA is on track to roll out its second Space Launch ...