NASA's Artemis II is set to launch Wednesday evening from Cape Canaveral, Fla. The four astronauts are preparing for liftoff at 6:24 p.m. EDT.

NASA officials said Sunday that the crew, Space Launch System rocket and Orion capsule are ready to launch the Artemis II mission to circle the moon.

NASA officials on Monday started the two-day countdown to the Artemis II mission launch, which will send a crew of four around the moon.