The agency has bumped up the wet dress rehearsal to increase its chances of launching within the February window, but could an Arctic blast interfere?

The SLS wet dress rehearsal is the rocket's last major hurdle before launch.

NASA had planned to run its wet dress rehearsal for the Artemis II mission at Kennedy Space Center as early as Saturday, but it will have to thread the needle before temperatures drop below the

The Artemis 2 moon mission's SLS rocket is on the pad at Kennedy Space Center for testing ahead of a possible Feb. 6 launch, and you can watch it 24/7 via this livestream.

NASA is racing toward its first crewed trip around the Moon in more than fifty years, but the countdown is unfolding under an unusual cloud of technical unease. The Artemis II mission will send four astronauts around the Moon and back in the Orion capsule,