NASA is poised to launch four astronauts on a historic nine-day trip around the moon and back. Here's everything to know about the Artemis II mission.

CAPE CANAVERAL, Fla. (AP) — After weeks of fuel leaks and other issues, NASA faced a trouble-free countdown Tuesday on the eve of astronauts’ first trip to the moon in more than half a century. Officials reported the moon rocket was doing well on the pad, and the weather looked promising. Forecasters put the odds of favorable conditions at 80%.

WASHINGTON — Artemis II, the mission bringing Americans back around the moon for the first time in more than five decades, was set to launch in early February, but that isn't when it will take to the sky. After two delays, the launch window is closing.

NASA hauled its Artemis II moon rocket off its seaside pad Wednesday for a slow trip back to a processing facility to track down and fix a helium pressurization problem that delayed launch of four astronauts on a flight around the moon from this month to ...