After weeks of delays, NASA is finally poised for the launch of a historic flight this week to send a crew of four astronauts on a trailblazing nine-day trip around the moon and back.

NASA's Artemis 2 mission will send four astronauts on a 10-day journey around the moon, the first crewed mission toward the moon in over 50 years.

On launch day, commander Reid Wiseman, pilot Victor Glover, and mission specialists Christina Koch and Jeremy Hansen will liftoff from Pad 39B at NASA’s Kennedy Space Center spacecraft atop NASA’s SLS...