For the first time in more than 53 years, NASA is preparing to send humans beyond low Earth orbit. As soon as Wednesday evening, four astronauts will embark on an a more than nine-day mission with the goal of flying around the Moon and back.

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.

From a race with China to lunar discoveries, the US is investing time, effort and money to head to the Moon - and beyond.